100 POINTS!!! PLEASE HELP!
1. If the uncertainty of the magnitude of momentum approaches zero, the uncertainty in the location ____.
goes to infinity
is undefined
goes to zero
remains constant
2. What is the de Broglie wavelength of a 1.22 kg discus moving at a speed of 12 m/s? (h = 6.626 x 10-34 J·s)
5.68 x 10-35 m
4.53 x 10-35 m
5.53 x 10-35 m
3.42 x 10-35 m
3. Which of the following are true? Select all that apply.
Light exhibits wave characteristics when interacting with solid matter.
All matter exhibits both wave and particle characteristics.
Light exhibits particle characteristics when interacting with solid matter.
All matter has a specific de Broglie wavelength.
4. With what speed would a particle with a mass of 1.05 x 10-17 kg have to move if it had a de Broglie wavelength of 3.78 x 10-25 m?
2.03 x 108 m/s
3.94 x 108 m/s
1.68 x 108 m/s
6.31 x 108 m/s
5. Which of these scientists is most known for their postulate that all matter can exhibit wave-like behavior?
De Broglie
Einstein
Young
Planck
TROLLS AND POINT FARMING WILL BE REPORTED!!!!
Answers
Answer:
Question 1 - Answer (A) Goes to infinity
Question 2 - (B) 4.53 x 10^-35 m
Question 3 - Answer (C) Light exhibits particle characteristics when interacting with solid matter.
Answer (B) All matter exhibits both wave and particle characteristics.Question 4- (C) 1.68 x 10^8 m/s
Question 5- (A) De Broglie
Explanation:
Question 1: (A) Goes to Infinity
(Explanation: - In accordance with Heisenberg's uncertainty principle, which states that the product of the uncertainties in position and momentum of a particle cannot be less than Planck's constant divided by 4π. Therefore, if the uncertainty in momentum approaches zero, the uncertainty in position must approach infinity to satisfy this principle).
Question 2:
The De Broglie wavelength of a 1.22 kg discusses moving at a speed of 12 m/s is approximately.
4.53 x 10^-35 m
Calculation:
De Broglie wavelength is given by the equation:
wavelength = h/mv, Where:
h is the Planck's constant (6.626 x 10^-35 J.s)m is the mass of the object (1.22 kg in this case)v is the velocity of the object (12 m/s in this case)So, substituting these values into the equation you get:
wavelength = 6.626 x 10^-34 / 1.22 * 12
Answer (B) = 4.53 x 10^-35 m
Question 3:
Answer (C) Light exhibits particle characteristics when interacting with solid matter. (Explanation: - Such as diffraction and interference patterns. This is the basis for techniques like X-ray crystallography used to determine molecular structures.)Answer (B) All matter exhibits both wave and particle characteristics. (Explanation: - This was first proposed by Louis de Broglie in his Ph.D. thesis in 1924.)Statement (D) is false, because, all matter will have a specific De Broglie wavelength only when only when matter is moving or having momentum.Statement (A) is also False!Question 4:
Given:
Mass = 1.05 x 10^-17 kg
wavelength = 3.78 x 10^-25 m
De Broglie wavelength:
wavelength = h/mv, Where:
h = Planck's constant = 6.63 x 10^-34
3.78 x 10^-25 = 6.63 x 10^-34 / 1.05 x 10^-17 x v
V = 6.63 x 10^-34 / 3.78 x 10^-25 x 1.05 x 10^-17
v = 1.68 x 108 m/s
So, the Speed of the Particle:
Answer : (C) 1.68 x 108 m/s
Question 5: Self Explanatory
Answer: (A) De Broglie
(Explanation:- Louis de Broglie proposed that all matter can exhibit wave-like behavior. This means that particles can display properties of both waves and particles, depending on how they are observed.)
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Related Questions
1. A car is traveling at 36 m/s hits a tree and comes to rest in 0.05 seconds.
a. What is the acceleration of the car?
b. Airbags deploy in a car if the acceleration of a car exceeds -600 m/s^2 Will the airbags deploy?
Answers
Answer: a. -720m/s^2
b. Yes, airbags will deploy
Explanation:
The formula for acceleration is:
= (Final velocity - Initial velocity)/Time
Final velocity = 0m/s
Initial velocity = 36m/s
Time taken = 0.05s
= (Final velocity - Initial velocity)/Time
= (0 - 36)/0.05
= -36/0.05
= -720m/s^2.
Since it's negative, it shows that there was a deceleration.
2. Yes the airbag will deploy since the acceleration gotten is more than -600 m/s^2.
a stone is thrown vertically upwards with an initial velocity of 20m/s. find the maximum height it reaxhes and the time taken by it to reach the height.
Answers
Explanation: → S = 20m. Hence, The maximum Height reached by stone is 20m and in 2s
State all facts and questions within the diagram.
Answers
On minerals and effects of mining:
The mineral in the diagram is water. Water is a mineral because it is a naturally occurring, inorganic substance that has a definite chemical composition.Mining can pollute water, air, and soil. It can also disrupt wildlife habitats and contribute to climate change.What are other effects of mining?Facts:
Water is a mineral.A mountain is a landform that is typically higher than a hill.A plant is a living organism that can make its own food.After mining, the land may be left scarred and the environment may be damaged. It can take many years for the environment to recover from mining.Water pollution: Mining can contaminate water with heavy metals, chemicals, and sediments. This can make water unsafe to drink, swim in, or use for irrigation.
Air pollution: Mining can release dust, fumes, and gases into the air. This can contribute to respiratory problems and other health problems.
Soil pollution: Mining can contaminate soil with heavy metals, chemicals, and sediments. This can make soil unsafe for growing crops or for other uses.
Wildlife habitat disruption: Mining can destroy wildlife habitats. This can lead to the loss of species and the disruption of ecosystems.
Climate change: Mining can contribute to climate change by releasing greenhouse gases into the atmosphere.
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Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells?
Burning fossil fuels contributes to climate change.
Burning fossil fuels takes place inside expensive fuel cells.
Fossil fuels aren’t widely available, but pure hydrogen is.
Fossil fuels are nonrenewable.
Answers
Answer:
Burning fossil fuels contributes to climate change.
Fossil fuels are nonrenewable.
Explanation:
Fossil fuels are fuels formed from the remains of dead organic matters that have long been buried under the ground while hydrogen fuel cells are formed from electrochemical reactions.
Fossil fuel burning creates pollution in the environment and some of the pollutants generated contribute to global warming and associated climate change. This is as opposed to fuel cells that generate power through electrochemical reactions and whose products can be converted for other uses.
Also, fossil fuel deposits are finite and non-renewable. Once their deposits become exhausted, there is no way to artificially regenerate them unlike fuel cells.
Answer:
i hope this helps
Explanation:
what is the difference between speed and velocity in physics
Answers
The primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction
Speed and velocity are two critical concepts in physics. They are used to describe the motion of an object. While both describe how fast an object is moving, there are some fundamental differences between the two. Let's explore these differences.
What is speed?
Speed is a scalar quantity that describes how quickly an object moves. It is measured in meters per second (m/s) or kilometers per hour (km/h).
Speed can be calculated using the following formula:
speed = distance ÷ time
For example,
if an object covers a distance of 150 meters in 10 seconds, its speed can be calculated as follows:
Speed = distance ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s)
What is velocity?
Velocity, on the other hand, is a vector quantity that describes how fast an object is moving in a particular direction. It is measured in meters per second (m/s) or kilometers per hour (km/h).
Velocity can be calculated using the following formula:
velocity = displacement ÷ time
For example, if an object travels a displacement of 150 meters in 10 seconds in a specific direction, its velocity can be calculated as follows:
Velocity = displacement ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s) in a specific direction.
In conclusion, the primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction.
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The International Space Station (ISS) orbits Earth at an altitude of 4.08 × 105 m above the surface of the planet. At what velocity must the ISS be moving in order to stay in its orbit?(1 point)
A) 7.91 × 10^3 m/s
B) 3.12 × 10^4 m/s
C) 7.66 × 10^3 m/s
D) 8.17 × 10^3 m/s
Satellite A is orbiting Earth at an altitude of 500 km and Satellite B is orbiting 800 km above the surface. How does the velocity of Satellite A compare to the velocity of Satellite B?(1 point)
A) It depends on the masses of the satellites.
B) The velocity of Satellite A is greater than the velocity of Satellite B.
C) The velocity of Satellite B is equal to the velocity of Satellite A.
D) The velocity of Satellite A is less than the velocity of Satellite B.
What is the direction of the net force acting on a satellite as it orbits Earth at a constant speed?(1 point)
A) in the direction the satellite is moving
B) toward the center of Earth
C) away from the center of Earth
D) opposite the direction the satellite is moving
What happens to the gravitational force and orbital velocity of a satellite as the satellite transfers to an orbit that is closer to Earth?(1 point)
A) The gravitational force decreases and the velocity increases.
B) The gravitational force increases and the velocity increases.
C) The gravitational force decreases and the velocity decreases.
D) The gravitational force increases and the velocity decreases.
Answers
Newton's second law and universal gravitation law allow to find the results for questions about the motion of satellites in orbit are:
1) The correct answer is D: v = 8.17 10³ m/s
2) The correct answer is B
The velocity of Satellite A is greater than the velocity of Satellite B.
3) The correct answer is B
Toward the center of Earth
4) The correct answer is B
The gravitational force increases and the velocity increases.
Newton's second law establishes a relationship between force, mass, and the acceleration of bodies.
F = m a
In the case of the satellite the force is given by the law of universal gravitation.
\(F = - G \frac{Mm}{r^2 }\)
Where G is the constant of universal gravitation. M and m the mass of each object and r the distance between them.
In this case the satellite is in a circular orbit, therefore the acceleration is centripetal.
\(a = \frac{v^2}{r}\)
We substitute.
\(G \frac{Mm}{r^2} = m \frac{v^2}{r}\)
\(\frac{GM}{r} = v^2\)
Let's analyze the answers to find the correct one.
1) They indicate the height of the space station r = 4.08 10⁵ m and ask the speed.
\(v= \sqrt{ \frac{6.67 \ 10 ^{-11} 5.9 \ 10^{24}}{4.08 \ 10^6 } }\)
v = 9.82 10³ m / s
The correct answer is D.
2) Satellite A has an orbit of hₐ = 500 km and satellite b an orbit of
h_b = 800 km
The distance from the center of the earth to each satellite is:
rₐ = R + hₐ
r_b = R + h_b
rₐ = 6.37 106 + 500 10³ = 6.87 10⁶ m
r_b = 6.37 10⁶ + 800 10³ = 7.17 10⁶ m
Let's find the ratio of the speeds
\(\frac{v_a}{v_b} = \sqrt{ \frac{r_b}{r_a} } \\\frac{v_a}{v_b} = \sqrt{ \frac{7.17}{6.87} }\)
\(\frac{v_a}{v_b}\) = 1,022
we see that the speed of satellite a is slightly greater than the speed of satellite b.
Let's analyze the claims.
A) False. The speed does not depend on the mass of the satellites.
B) True. The velocity of a is slightly greater than the velocity of b.
C) False. The speed of a is greater.
D) False. The speed of a is greater.
3) As the orbit is circular, the force must be radial, that is, it points towards the center of the earth.
Let's analyze the claims.
A) False. The speed modulus does not change, therefore there is no acceleration in the direction of the satellite.
B) True. Aim for the center of the Earth, change the direction of the velocity.
C) False. Aim for the scepter of the earth.
D) false. The modulus of velocity is constant and the direction changes towards the center of the earth, therefore the force must go towards the center of the earth.
4) The force in the law of universal gravitation increased as the distance decreased.
When a satellite approaches the earth its speed must increase since the speed is proportional in inverse of the square root of the distance.
Let's examine the claims.
A) False. The attraction force increases.
B) True. You agree with the explanation.
C) False. The gravitational force increases.
D) False. Speed increases.
In conclusion, using Newton's second law and the universal law of gravitation we can find the results for the questions about the movement of satellites in orbit are:
1) The correct answer is D: v = 8.17 10³ m/s
2) The correct answer is B
The velocity of Satellite A is greater than the velocity of Satellite B.
3) The correct answer is B
Toward the center of Earth
4) The correct answer is B
The gravitational force increases and the velocity increases.
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Answer:
1. 7.66 × 10^3 m/s
2. The velocity of Satellite A is greater than the velocity of Satellite B.
3. toward the center of Earth
4. The gravitational force increases and the velocity increases.
Explanation:
a car starts from the rest and accelerates at 9.54m/s for 6.5 seconds. what is the distance covered by the car
Answers
Answer:
= 201.53 meters
Explanation:
A car started from rest and accelerated at 9.54 m/s^2 for 6.5 seconds. How much distance was covered by the car?
Use the formula d = \(\frac{at^{2} }{2} ,\)
where d is the distance, t is the time and "a" is the acceleration.
\(d=\frac{9*54*6*5^{2} }{2} = 201.53 m\)
Most cars have a coolant reservoir to catch radiator fluid that may overflow when the engine is hot. A radiator is made of copper and is filled to its 21.1 L capacity when at 12.2°C. What volume of radiator fluid (in L) will overflow when the radiator and fluid reach a temperature of 95.0°C, given that the fluid's volume coefficient of expansion is β = 400 ✕ 10−6/°C? (Your answer will be a conservative estimate, as most car radiators have operating temperatures greater than 95.0°C).
Answers
Answer:
0.699 L of the fluid will overflow
Explanation:
We know that the change in volume ΔV = V₀β(T₂ - T₁) where V₀ = volume of radiator = 21.1 L, β = coefficient of volume expansion of fluid = 400 × 10⁻⁶/°C
and T₁ = initial temperature of radiator = 12.2°C and T₂ = final temperature of radiator = 95.0°C
Substituting these values into the equation, we have
ΔV = V₀β(T₂ - T₁)
= 21.1 L × 400 × 10⁻⁶/°C × (95.0°C - 12.2°C)
= 21.1 L × 400 × 10⁻⁶/°C × 82.8°C = 698832 × 10⁻⁶ L
= 0.698832 L
≅ 0.699 L = 0.7 L to the nearest tenth litre
So, 0.699 L of the fluid will overflow
What is the electron drift speed in a typical current-carrying wire?.
Answers
The speed at which electrons move through a typical current-carrying wire is slow, but the real electrical current can be high because there are so many electrons.
Even though the current itself can be very high, the speed at which electrons move through a normal wire that carries electricity is not very fast. Electrons move through a metal carrier, like a wire, to move the electric current. But it's important to keep in mind that the speed at which electrons actually drift is much slower than the speed at which electrical signals or energy spread through a line.
The drift speed is the average speed that electrons move in the opposite direction of the current flow. It depends on how much power is put on it and how well the wire works. The speed of drift in most wires is on the order of millimetres per second or even less. This slow speed is caused by the large number of electrons in the wire and the collisions they have with atoms and other electrons, which slows them down generally.
Even though the speed of a single electron's drift may be slow, the total flow of electrical current can be fast because there are so many electrons involved. The amount of charge flow per unit time is what defines the current, which is usually measured in amperes (A). Current is the sum of the speed of the wire's movement, its cross-sectional area, and the charge each electron carries.
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The symbol “g” can be used to refer to the acceleration due to gravity. “g” can also have another unit. Which of these is also a unit of “g”?
A- J/kg
B- J/kg2
C- N/kg
D- N/kg2
Answers
The symbol “g” can be used to refer to the acceleration due to gravity. “g” can also have another unit. N/kg, is the another unit used to represent "g".
The correct answer is option C.
The unit of "g" that is also used to represent another unit is option C, N/kg. In physics, the symbol "g" is commonly used to represent the acceleration due to gravity, which is approximately 9.8 m/s² on the surface of the Earth. This means that every kilogram of mass experiences a force of 9.8 Newtons when subjected to Earth's gravitational field.
The unit N/kg represents the Newton per kilogram, which is the unit of gravitational field strength or gravitational acceleration. This unit describes the force experienced by a mass per unit mass. In other words, it represents the gravitational force acting on each kilogram of mass.
To understand this concept, let's consider the formula for gravitational force:
F = m * g
where F is the force, m is the mass, and g is the gravitational acceleration. In this equation, the unit of force is Newtons (N), and the unit of mass is kilograms (kg). Therefore, to have consistent units, the gravitational acceleration "g" must have the unit N/kg.
Option A, J/kg, represents the unit of energy per unit mass, which is the joule per kilogram. Option B, J/kg², represents the unit of energy per unit mass squared, which is not directly related to the gravitational acceleration. Option D, N/kg², represents the unit of force per unit mass squared, which is also not directly related to the gravitational acceleration.
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How many centimeters are there in 2.35m?
Answers
Answer:
there are 235cm in 2.35m
after a great many contacts with the charged ball, how is the charge on the rod arranged (when the charged ball is far away)? after a great many contacts with the charged ball, how is the charge on the rod arranged (when the charged ball is far away)? there is positive charge on end b and negative charge on end a. there is negative charge spread evenly on both ends. there is negative charge on end a with end b remaining neutral. there is positive charge on end a with end b remaining neutral.
Answers
After a great many contacts with the charged ball, the charge on the rod will be arranged with negative charge on end A and positive charge on end B when the charged ball is far away.
When the charged ball is brought in contact with the rod, some of the charge transfers from the ball to the rod. If the ball has a positive charge, electrons will flow from the rod to the ball, resulting in an excess of positive charge on the rod. Conversely, if the ball has a negative charge, electrons will transfer from the ball to the rod, leaving an excess of negative charge on the rod.
After numerous contacts between the charged ball and the rod, the charge will eventually distribute evenly along the length of the rod. This is because the excess charge on the rod will repel similar charges and attract opposite charges. As a result, the negative charge will accumulate on end A of the rod, while the positive charge will accumulate on end B.
When the charged ball is far away, the excess charge on the rod will remain distributed in this manner. The negative charge on end A and the positive charge on end B will persist, creating a charge separation along the rod. This charge arrangement is a result of the redistribution of charges due to the electrostatic forces between them.
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a dog lifts a 0.75 kg bone straight up through a distance of 0.11 m. How much work was done by the dog ?
Answers
The work done by the dog is 0.81J.
What is work done?Work done is a measure of energy expended in moving an object; most commonly calculated by multiplying the force by the distance.
It is said that no work is done if the object does not move.
The work done on an object is the amount of energy transferred to an object through work.
According to this question, a dog lifts a 0.75 kg bone straight up through a distance of 0.11 m. The force applied to break the bone must be calculated first as follows:
Force = mass × acceleration
Force = 0.75kg × 9.8m/s²
Force = 7.35N
Work done = 7.35N × 0.11m = 0.81J
Therefore, 0.81J is the work done by the dog.
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Describe what happens to the particles of water when it boils.
Answers
Answer:
The liquid turns to a gas.
Explanation:
If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. Particles in the middle of the liquid form bubbles of gas in the liquid.
Each of the 11 body systems:
A. Are interchangeable
B. Depends on others to function
C. performs a single task
D. Is controlled by the lungs
Answers
Each of the 11 body systems depends on others to function. So, the correct option is Option B.
The human body is actually an amazing combination of many different systems that work together to keep everything functioning correctly. For example, some systems handle food and energy, while others focus on taking in oxygen and moving it around the body. By learning about the different systems working inside the body, we can understand how everything works together to keep you healthy, growing, and strong. The various systems of our body are interconnected and are dependent upon each other. The circulatory system includes the heart the heart does not beat unless the nervous system including the brain tells the heart to beat. The skeletal system is also connected to our digestive system for an increase in the size and strength of the muscles, bones, and cartilage. It takes all the body systems for the proper growth and development of the human body.
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A flat metal washer is heated. As the washer's temperature increases. What happens to the hole in the center?
Answers
Answer:
expands
Explanation:
It gets bigger....expands.... just like if there was a solid disk of metal there which would expand
What part of a motor causes its electromagnet to turn in the same direction
consistently, transforming electrical energy into mechanical energy?
A. Commutator
B. Loop of wire
C. Permanent magnets
D. Battery
PLS HELP
Answers
Answer:
A. Commutator
Explanation:
Commutator is part of a motor causes its electromagnet to turn in the same direction consistently, transforming electrical energy into mechanical energy.
What is energy?Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
A commutator is a rotary electrical switch in certain types of electric motors and electrical generators.
Commutator is part of a motor causes its electromagnet to turn in the same direction consistently, transforming electrical energy into mechanical energy.
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An electric field exerts force of 2.60 N on a 3.40 x 10-8 C charge. What is the magnitude of the electric field?Group of answer choices7.65 x 107 N/C8.43 x 107 N/C9.05 x 107 N/C12.0 x 107 N/C
Answers
ANSWER
\(7.65\cdot10^7N\/C\)EXPLANATION
We want to find the magnitude of the electric field.
To do this, we have to apply the formula for electric field:
\(E=\frac{F}{q}\)where F = force exerted on the charged particle
q = electric charge on the particle
Hence, the magnitude of the electric field is:
\(\begin{gathered} E=\frac{2.60}{3.40\cdot10^{-8}} \\ E=7.65\cdot10^7N\/C \end{gathered}\)The correct answer is the first option.
A bowling ball has a mass of 7. 2 kg and a weight of 70. 6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15. 0 N. What is the force that the pin exerts on the bowling ball? 7. 2 N 15. 0 N 70. 6 N 85. 6 N.
Answers
The correct answer is option B
If a bowling ball has a mass of 7. 2 kg and a weight of 70. 6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15. 0 N. The force that the pin exerts on the bowling ball is 15.0 N.
This is because the force of the ball hitting the pin (15.0 N) is equal and opposite to the force of the pin hitting the ball. The mass and weight of the bowling ball are not relevant to this calculation.
The force that the pin exerts on the bowling ball can be determined using Newton's third law of motion, which states that every action has an equal and opposite reaction. Since the bowling ball strikes the pin with a force of 15.0 N, the pin exerts an equal and opposite force on the bowling ball.
Therefore, the force that the pin exerts on the bowling ball is also 15.0 N. The mass and weight of the bowling ball (7.2 kg and 70.6 N, respectively) are not directly related to the force exerted by the pin on the ball.
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please help! you are awesome! also brainliest :)
The diagram below shows the two forces that keep Earth in orbit around the Sun.
What is responsible for Earth's movement toward the Sun?
A. Sun's forward motion
B. Earth's forward motion
C. Expansion of the universe.
D. force of gravity
Answers
Answer:
It's d
Explanation:
Answer: D
Explanation:
Force of gravity
Why work and energy both have same unit? Give reasons?
Answers
Answer:
Explanation:
both have same unit because energy is defined as the ability to do work and work is the measure of transfer of energy when an objects moved from one place to another place so both are same thats why both have same units
Another engineer is running a series of experiments with hydraulic systems. If she doubles the area of the input piston, what happens to the amount of pressure transmitted by the system?
Answers
Answer:
The pressure remains the same.
F = P * A the amount of force transmitted would double if only the input area is changed. Pressure is the same at all points in the system.
Frank is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 26.7 Newtons at an angle of 17 degrees above the horizontal to drag his backpack a horizontal distance of 129 meters to the right. Determine the work done upon the backpack. in joules.
Answers
The work done upon the backpack is 3293 Joule.
What is force?
The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
A spring balance can be used to calculate the Force. The Newton is the SI unit of force.
The work done upon the backpack is = applied force × displacement × cosα
= 26.7 N × 129 meters × cos17°
= 3293 Joule.
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A dart shot at a monkey is traveling 6 m/s horizontally, while simultaneously traveling 9 m/s downward. What is the magnitude of the total velocity of the dart?
A dart shot at a monkey is traveling 10 m/s horizontally, while simultaneously traveling 7 m/s downward. At what angle below the horizontal is the dart traveling? Answer in degrees
Answers
If a dart shot at a monkey is traveling 6 m/s horizontally, while simultaneously traveling 9 m/s downward, then the total velocity of the dart would be 10.81 m /s.
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
As given in the problem a dart shot at a monkey is traveling 6 m/s horizontally, while simultaneously traveling 9 m/s downward.
Total velocity of the dart = √ ( 6² + 9² )
= 10.81 m /s
Thus, the total velocity of the dart would be 10.81 m /s.
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The movement of a wave cannot be detected using scientific instruments.TrueFalse
Answers
The movement of wave can be detected using scientific instruments.
One such example is Seismometer.
Thus, the statement is false.
a permanent bar magnet with the north pole pointing downward is dropped through a solenoid, as shown in the illustration. a bar magnet oriented vertically, with its south pole on top and its north pole on the bottom. directly below the magnet, and also aligned vertically, is a solenoid consisting of wire wound around an open tube. when viewed from above, the wire spirals around and down the tube in a clockwise fashion. to the left of the solenoid, the wire leads are connected to an ammeter, closing the circuit. what is the direction of the induced current that would be measured in the ammeter as the magnet falls completely through the solenoid?
Answers
Option A is correct, Induced current will first be up, then down direction of induced current that would be measured in the ammeter as the magnet falls completely through the solenoid will be First up, then down.
Induced current results from a change in a magnetic field that opposes a change in flux, according to Lenz's law. Additionally, due to the magnet, the magnetic field inside the magnet is directed from the south pole to the north pole.
Now, for the first instance:
An increase in the upward magnetic field occurs when the south pole is inserted. A downward magnetic field is produced by induced current.
then the solenoid's current will be reduced by the right-hand rule.
So, we'll start with current as measured by an ammeter.
A decrease in the upward magnetic field occurs when the North Pole is inserted. An upward magnetic field is produced by induced current.
then the solenoid's current will increase due to the right hand rule.
Therefore, the current shown by the ammeter will decrease.
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A permanent bar magnet with the south pole pointing downward is dropped through a solenoid, what is the direction of the induced current that would be measured in the ammeter as magnet falls completely through solenoid?
According to Newton’s first law of motion, when will an object at rest begin to move?
when its inertia decreases to zero
when an unbalanced force acts upon it
when the action and reaction forces are equal
when two equal and opposite forces act upon it
Answers
According to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.
option B is the correct answer.
What is Newton's first law of motion?Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.
In other words, an object will maintain its state of motion (whether it is at rest or moving in a straight line at a constant speed) unless a force acts upon it.
Thus, according to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.
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Answer:
its B
Explanation:
what must happen in order for a metaphoric rock to be transformed into a igneous rock
Answers
Answer:
If the newly formed metamorphic rock continues to heat, it can eventually melt and become molten (magma). When the molten rock cools it forms an igneous rock.
Explanation:
How can a model represent the potential energy in a system when the distance between stationary objects changes?
Answers
The potential energy in a system is inversely proportional to the distance between stationary objects. So, if the distance between stationary objects changes, potential energy also changes inversely.
What is potential energy?Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases. If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy.
It is capable of performing more work when raised. Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the elevated ball has more potential energy as they become further apart.
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a soccer ball at rest is kicked horizontally for a displacement of 21 m. What is the ball's final velocity after 4s
Answers
The final velocity of the ball after 4s will be 5.25m/s2.
What is Velocity?Velocity of a body is its speed and the direction in which it is moving.
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time (e.g. 60 km/h northbound).
It can also be described as the instantaneous rate of change of the body's distance traveled, and the direction in which the distance is changing.
Velocity is a vector quantity as it has both magnitude and direction.
From the question;
displacement, s = 21m
time = 4s
Velocity = displacement / time
Velocity = 21/4
Velocity = 5.25m/s2
Hence, the ball would move with a velocity of 5.25m/s2.
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