Answers
For electricity generation the words in order are:
a You can generate electricity by moving a coil of wire in a magnetic field. The size of the voltage depends on the speed of the movement and the strength of the magnet.
b In a model generator, a coil rotates between the poles of a magnet. If a coil with more turns is used the voltage is greater. If the coil spins faster, the voltage is greater.
What is the influence of induced voltage?a. If the student moved the magnet towards the coil at a slower speed, she would notice that the induced voltage on the voltmeter decreases. This is because the voltage induced is proportional to the rate of change of the magnetic field, which decreases as the speed decreases.
b. If the student moved the magnet towards the coil at the same speed, she would notice that the induced voltage on the voltmeter remains the same. This is because the voltage induced is proportional to the rate of change of the magnetic field, which is constant if the speed is constant.
c. If the student turned the magnet round and moved it towards the coil, she would notice that the induced voltage on the voltmeter is in the opposite direction. This is because the direction of the induced voltage is determined by the direction of the change in magnetic field, which is reversed when the magnet is turned round.
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Related Questions
What was the big bang?
Answers
The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!
What's This Big Bang All About?
In 1927, an astronomer named Georges Lemaître had a big idea. He said that a very long time ago, the universe started as just a single point. He said the universe stretched and expanded to get as big as it is now, and that it could keep on stretching.
What an Idea!
The universe is a very big place, and it’s been around for a very long time. Thinking about how it all started is hard to imagine.
Some More Information
Just two years later, an astronomer named Edwin Hubble noticed that other galaxies were moving away from us. And that’s not all. The farthest galaxies were moving faster than the ones close to us.
This meant that the universe was still expanding, just like Lemaître thought. If things were moving apart, it meant that long ago, everything had been close together.
Everything we can see in our universe today—stars, planets, comets, asteroids—they weren't there at the beginning. Where did they come from?
A Tiny, Hot Beginning
When the universe began, it was just hot, tiny particles mixed with light and energy. It was nothing like what we see now. As everything expanded and took up more space, it cooled down.
The tiny particles grouped together. They formed atoms. Then those atoms grouped together. Over lots of time, atoms came together to form stars and galaxies.
The first stars created bigger atoms and groups of atoms. That led to more stars being born. At the same time, galaxies were crashing and grouping together. As new stars were being born and dying, then things like asteroids, comets, planets, and black holes formed!
A 125 kg mail bag hangs by a vertical rope 3.3 m long. A postal worker then displaces the bag to a position 2.2 m sideways from its original position, always keeping the rope taut.
1) What horizontal force is necessary to hold the bag in the new position?
2) As the bag is moved to this position, how much work is done by the rope?
3) As the bag is moved to this position, how much work is done by the worker?
Answers
Answer:
1) the required horizontal force F is 1095.6 N
2) W = 0 J { work done by rope will be 0 since tension perpendicular }
3) work is done by the worker is 1029.4 J
Explanation:
Given that;
mass of bag m = 125 kg
length of rope \(l\) = 3.3 m
displacement of bag d = 2.2 m
1) What horizontal force is necessary to hold the bag in the new position?
from the figure below; ( triangle )
SOH CAH TOA
sin = opp / hyp
sin\(\theta\) = d / \(l\)
sin\(\theta\) = 2.2/ 3.3
sin\(\theta\) = 0.6666
\(\theta\) = sin⁻¹ ( 0.6666 )
\(\theta\) = 41.81°
Now, tension in the string is resolved into components as illustrated in the image below;
Tsin\(\theta\) = F
Tcos\(\theta\) = mg
so
Tsin\(\theta\) / Tcos\(\theta\) = F / mg
sin\(\theta\) / cos\(\theta\) = F / mg
we know that; tangent = sine/cosine
so
tan\(\theta\) = F / mg
F = mg tan\(\theta\)
we substitute
Horizontal force F = (125kg)( 9.8 m/s²) tan( 41.81° )
F = 1225 × 0.8944
F = 1095.6 N
Therefore, the required horizontal force F is 1095.6 N
2) As the bag is moved to this position, how much work is done by the rope?
Tension in the rope and displacement of mass are perpendicular,
so, work done will be;
W = Tdcos90°
W = Td × 0
W = 0 J { work done by rope will be 0 since tension perpendicular }
3) As the bag is moved to this position, how much work is done by the worker
from the diagram in the image below;
SOH CAH TOA
cos = adj / hyp
cos\(\theta\) = (\(l\) - h) / \(l\)
we substitute
cos\(\theta\) = (\(l\) - h) / \(l\) = 1 - h/\(l\)
cos\(\theta\) = 1 - h/\(l\)
h/\(l\) = 1 - cos\(\theta\)
h = \(l\)( 1 - cos\(\theta\) )
now, work done by the worker against gravity will be;
W = mgh = mf\(l\)( 1 - cos\(\theta\) )
W = mf\(l\)( 1 - cos\(\theta\) )
we substitute
W = (125 kg)((9.8 m/s²)(3.3 m)( 1 - cos41.81° )
W = 4042.5 × ( 1 - 0.745359 )
W = 4042.5 × 0.254641
W = 1029.4 J
Therefore, work is done by the worker is 1029.4 J
A
where light does not strike.
A) mirror
C) wave
is an area
B) transparent
D) shadow
q
Answers
Answer:
d
Explanation:
because when an object stand in front of light, light bends around the other and doesn't go through it
8
Figure 2.24 shows a model of a skyscraper which Omar made
for the school exhibition. It is mounted on a firm plastic base
and has a total weight, W, of 4.0 N. Omar applies a force Fas
shown to test the stability of his model.
Calculate the minimum value of F required to cause the model
to rotate about point P.
Answers
Answer:
24-997
Explanation:
PART ONE
The figure shows a claw hammer as it pulls a
nail out of a horizontal board.
If a force of magnitude 99.9 N is exerted horizontally as shown, find the force exerted by the hammer claws on the nail. (Assume that the force the hammer exerts on the nail is parallel to the nail).
Answer in units of N.
PART TWO
Find the force exerted by the surface on the point of contact with the hammer head. Assume that the force the hammer exerts on the nail is parallel to the nail.
Answer in units of N.
Answers
(1) The force exerted by the hammer claws on the nail is 57.3 N.
(2) The force exerted by the surface on the point of contact with the hammer head is 81.83 N.
What is the force exerted by the hammer claws on the nail?The force exerted by the hammer claws on the nail is calculated as follows;
Fy = Fn sinθ
where;
θ is the angle of inclination of the hammerFy = 99.9 N x sin (35)
Fy = 57.3 N
The force exerted by the surface on the point of contact with the hammer head is calculated as follows;
Fx = Fn x cosθ
Fx = 99.9 N x cos (35)
Fx = 81.83 N
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If a car travels 400m
in 25s
Calculate the
average Speed
Answers
A 5.00 kg wagon is being pulled along at 2.50 m/s. A 2.50 kg box is dropped in the wagon, which continues at the same speed. What was the change in momentum?
Answers
Answer:
Why are you talking help in french wow u bad
Explanation:
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a washing machine uses 750 watts of power and costs $0.15 per kilowatt-hour. How much does it cost to run a washing machine for two hours? Round your answer to the nearest cent.
Answers
Answer:$0.1125
Explanation:
power=750 watts
Power=750/1000=0.75 kilowatts
$0.15 for 1 kilowatts-hour
$h for 0.75 kilowatts-hour
$h=(0.75 x 0.15)
$h=$0.1125
Answer: 0.23
Explanation:
this is the correct answer on edg
the very act of observing a particle has a dramatic effect on its behaviour why do you think this is the case
Answers
Answer:
Explanation:
In the microscopic world of quantum mechanics, particles don't behave like familiar everyday objects. They can exist in multiple states simultaneously and behave as both particles and waves. When we try to measure or observe a particle, we typically use light or other particles to interact with it. However, this interaction can disturb the particle's state. Imagine trying to measure the position of an electron using light. Light consists of photons, and when photons interact with the electron, they transfer energy to it. This energy exchange causes the electron's position and momentum to become uncertain. The more precisely we try to measure its position, the more uncertain its momentum becomes, and vice versa. This is known as the Heisenberg uncertainty principle.
So, the act of observing a particle disturbs its state because the interaction between the observer and the particle affects its properties. The very act of measurement or observation introduces a level of uncertainty and alters the particle's behavior. It's important to note that this behavior is specific to the quantum world and doesn't directly translate to the macroscopic world we experience in our daily lives. Quantum mechanics operates at extremely small scales and involves probabilities and uncertainties that are not typically noticeable in our macroscopic observations.
You turn on your car's headlights while driving at night. What transformation is taking place?
A. Thermal to light
B. Light to chemical
C. Electrical to light
D. Light to electrical
Answers
Answer: C.
Explanation:
Answer:Electrical to light
Explanation:
Apex
A cube has a density of 1800 kg/m3 while at rest in the laboratory. What is the cube's density as measured by an experimenter in the laboratory as the cube moves through the laboratory at 89.0 % of the speed of light in a direction perpendicular to one of its faces?
Answers
Answer:
3947.7 kg/m³
Explanation:
The relativistic density can be calculated using below expression;
ρ = ρ' /[√( 1 - v²/c²)]
where,
ρ = Change in Density as a result of motion
ρ'= Actual density of cube
ρ' is given as = 1800 kg/m³
v = Velocity that the cube moves = 0.89c
c = Speed of light
c= 3×10^8 m/s
ρ = ρ' /[√( 1 - v²/c²)]
if we substitute the given values we have
ρ= 1800/ √ 〈1- 0.89c²/ c²〉
ρ=3947.7 kg/m³
Hence, the cube's density is 3947.7 kg/m³
What is the horizontal layer of soil called
Answers
The horizontal layer of soil called are called soil horizons.
What is the horizontal layer of soil called?Soil is made up of clear horizontal layers; these layers are called horizons. They range from rich, organic upper layers (humus and topsoil) to basic rocky layers ( subsoil, regolith, and bedrock). Soils are named and confidentially based on their horizons.
The soil profile has four distinct layers a soil horizon is a horizontal layer of soil with physical or chemical attributes that separate it from layers above and below. More simply, each horizon. Soil is made up of clear horizontal layers. These layers are called horizons.
So we can conclude that A soil horizon is a layer parallel to the soil aspect whose physical, chemical, and biological quality differ from the layers.
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Which reaction is mainly responsible for the cause of energy radiation from the sun?
Answers
Nuclear fusion reaction is mainly responsible for the cause of energy radiation from the sun.
Solar energy is created due to this nuclear fusion. The discharge of energy in the sun is 10²⁶ joules per second
There is nuclear fusion of hydrogen into helium molecules.
Takes place in solar nucleus/plasma, because this reaction can occur only in high temperature.
The special type of fusion that take place in sun is proton-proton fusion.
This kind of fusion is responsible for the cause of energy radiance and is a very efficient method of producing energy.
The 2 condition which help H-H atoms come together is large mass of the sun and the force of gravity.
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Discuss the chemical bond exist in silicon crystal?
Answers
A ball punted vertically has a hang time of 3.8 seconds.
A. Construct position-time, velocity-time, and acceleration-time graphs and a motion map for this situation.
B. What was its initial velocity?
Answers
Answer:
A.
Position-time graph:
The position-time graph for the ball punted vertically will be a parabolic curve, with the vertex at the highest point of the ball's trajectory. Since the initial position is zero, the curve will go through the origin.
Velocity-time graph:
The velocity-time graph will be a straight line that starts at the initial velocity and decreases linearly until it reaches zero at the highest point of the ball's trajectory. After that, the velocity increases linearly in the negative direction until the ball hits the ground.
Acceleration-time graph:
The acceleration-time graph will be a constant negative value, representing the acceleration due to gravity.
Motion map:
A motion map is a diagram that shows the position of an object at several specific times during its motion. For the ball punted vertically, the motion map would look like this:
|O|------|-------|------|-------|------|H|
O represents the initial position, and H represents the highest point of the ball's trajectory. The "|" symbols represent the position of the ball at regular intervals of time.
B.
To find the initial velocity of the ball, we can use the hang time and the acceleration due to gravity.
Hang time = 3.8 seconds
Acceleration due to gravity = -9.8 m/s^2
At the highest point of the ball's trajectory, the velocity is zero. Therefore, we can use the following kinematic equation to find the initial velocity:
hang time = (final velocity - initial velocity) / acceleration
Solving for initial velocity:
initial velocity = final velocity - (hang time x acceleration)
final velocity = 0 m/s
hang time = 3.8 s
acceleration = -9.8 m/s^2
initial velocity = 0 - (3.8 x -9.8)
initial velocity = 37.64 m/s
Therefore, the initial velocity of the ball was 37.64 m/s.
which of the following is a physical change?
A. a newspaper burns when placed in a fire.
B.an iron chair rusts when left outside
C.a sample of water boils and releases gas.
D.a plant changes carbon dioxide and water into sugar
Answers
what is this.
best answer gets brainiest
Answers
Answer:
the Thanksgiving turkey
A sports car moving at constant speed travels 164 m in 13.77 s. If it then brakes and comes to a stop in 3.6 s. What is its acceleration in terms of "g's", where 1.00 g = 9.80 m/s2?
Answers
Answer:
a = - 0.3376 g's
Explanation:
The sports car has a constant speed when travelling. Covered 164 m in 13.77 s. Thus, speed = 164/13.77 m/s
It brakes and now comes to a stop in 3.6 s.
Thus final velocity = 0 m/s
Formula for acceleration is;
a = (v - u)/t
a = (0 - (164/13.77))/3.6
a = -3.308 m/s²
In terms of g's", where 1.00 g = 9.80 m/s², we have;
a = -3.308/9.8 g's
a = - 0.3376 g's
A displacement vector is 23 km in length and directed 65° south of east. What are the components of this vector?
Eastward
Component Southward. Component
(a) 21 km 9.7 km
(b) 23 km 23 km
(c) 23 km 0 km
(d) 9.7 km 21 km
Answers
If a displacement vector is 23 km in length and directed 65° south of east. the components of this vector is: (a) 21 km 9.7 km.
What is the components of this vector?The displacement vector can be resolved into its eastward and southward components using trigonometry. Let's call the eastward component "x" and the southward component "y".
From the given information, we know that the displacement vector makes an angle of 65° south of east. This means that the angle between the vector and the eastward axis is 90° - 65° = 25°.
Using trigonometry, we can relate the length of the vector to its components:
cos 25° = x / 23
sin 25° = y / 23
Solving for x and y, we get:
x = 23 cos 25° ≈ 21 km
y = 23 sin 25° ≈ 9.7 km
Therefore, the answer is (a) 21 km eastward component and 9.7 km southward component.
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A cube of ice is taken from the freezer at -5.5 ∘C and placed in a 75-g aluminum calorimeter filled with 300 g of water at room temperature of 20.0 ∘C. The final situation is observed to be all water at 17.0 ∘C. The specific heat of ice is 2100 J/kg⋅C∘, the specific heat of aluminum is 900 J/kg⋅C∘, the specific heat of water is is 4186 J/kg⋅C∘, the heat of fusion of water is 333 kJ/Kg.
What was the mass of the ice cube?Express your answer to two significant figures and include the appropriate units.
Answers
Answer:
Explanation:
Let mass of ice cube taken out be m kg .
ice will gain heat to raise its temperature from - 5.5° to 0° and then from 0° to 17° .
Total heat gained = m x 2.1 x 5.5 + m x 333 + m x 4.186 x 17
= (11.55 + 333 + 71.162 )m
= 415.712 m kJ
Heat lost by aluminium calorimeter
= .075 x .9 x 3
= .2025 kJ
Heat lost by water
= .3 x 4.186 x 3
= 3.7674
Total heat lost
= 3.9699 kJ
Heat lost = heat gained
415.712 m = 3.9699
m = .0095 kg
9.5 gm .
Answer:
0.00954g or 9.5x\(10^{-3}\) kg
Explanation:
The only conversion that is needed is changing the heat of fusion of water from 333 kJ/kg to 333000 J/kg.
This is the condensed version of the equation needed for this problem: mcΔT + mL + mcΔT = mcΔT + mcΔT
This is the expanded version of the equation needed for this problem:
\(m_{ice}\)(\(c_{ice}\))(temperature of ice from -5.5°C to 0°C) + \(m_{ice}\)(L) + \(m_{ice}\)(\(c_{water}\))(temperature of water from 0°C to 17°C) = \(m_{water}\)(\(c_{water}\))(ΔT) + \(m_{aluminum}\)(\(c_{aluminum}\))(ΔT)
Use the equation to solve for the mass of ice:
m(2100)(5.5) + m(333000) + m(4186)(17) = 0.3(4186)(20-17) + 0.075(900)(20-17)
m [(2100x5.5) + 333000 + (4186x17)] = 3767.4 + 202.5
m(415712) = 3969.9
m = 0.00954g or 9.5x\(10^{-3}\) kg
5. What is the area of space around a magnet called?
O Magnetic field
O Magnetic space
O Induced magnet
ILL MARK BRAINLYEST PLZ HELPPPP HURRY !!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
Magnetic Field
Explanation:
Answer:
Magnetic field
Explanation:
3. A car with a mass of 1600 kg has a kinetic energy of 125 000 J. How fast is it moving?
Answers
The car is moving at approximately 12.5 meters per second.
The kinetic energy (KE) of an object can be calculated using the formula:
KE = 1/2 * m * \(v^2\)
where
KE = kinetic energy,
m =Mass of the object, and
v = velocity.
In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .
Substituting the values , we have:
125,000 J = 1/2 * 1600 kg *\(v^2\)
Now, we can solve for v by rearranging the equation:
\(v^2\) = (2 * 125,000 J) / 1600 kg
\(v^2\) = 156.25 \(m^2/s^2\)
Taking the square root, we find:
v = √156.25\(m^2/s^2\)
v ≈ 12.5 m/s
Therefore, the car is moving at approximately 12.5 meters per second.
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Pls tell me
Question: 1 way to keep people safe from hurricane.
Answers
Answer:
Hurricanes move fast so what you want to do is get into a basement or somthing underground so it will be harder for the hurricane to hit you
Explanation:
thanks for the coins
Drag the mass slider to give the skateboarder the largest mass possible. Drag and drop him on the three ramps, one at a time. Watch the kinetic energy bar as he travels down the ramps. Click the pause button right before he exits the ramp to freeze the action. Which ramp gives the skateboarder the greatest amount of kinetic energy? Which gives him the least? Now look at the speed dial. How does his speed relate to his kinetic energy?
Answers
1. Ramp 2. He gains the maximum kinetic energy from the steepest ramp.
2. Ramp 3 which is the flattest ramp should give him the least.
3. The greater his speed, the more kinetic energy he generates.
How is kinetic energy produced?
The simplest way to explain how kinetic energy is produced is; Motion produces kinetic energy. When there is some sort of movement, there is a likelihood of kinetic energy being produced.
Mechanical, thermal, electrical, and chemical energies can all produce kinetic energy.
For example, when Mechanical labor is done, a force acts on an item and causes it to move. This action then turns into kinetic energy.
Also, When an item is heated, the particles in it gain kinetic energy, raising its temperature.
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Answer:
The steepest ramp gives the greatest amount of kinetic energy. The flattest ramp gives the least amount of kinetic energy. The middle ramp is in between. As the skateboarder’s speed increases, so does his kinetic energy.
Explanation:
pluto
Please help me understand this
Answers
Answer: Can't see the photo clearly.
Explain how you would determine how much error there is between a vector addition and the displacement of the actual trip taken. Why aren’t vectors true straight - line paths in the real world? Would you expect the vector addition to be larger or smaller than the actual trip taken? Why?
Answers
Answer:
find the difference"vector addition" is likely to be larger than displacementExplanation:
No doubt your curriculum materials have an adequate discussion of error and how it is determined.
a) The error between two values is the difference between an approximation and the true value. You determine it by subtracting the true value from the approximation.
In the case of a trip, you need to decide what is the "true value" and what is the "approximation." The wording here suggests that the "displacement of the actual trip taken" is to be considered the "true value." Then, you determine the error by subtracting that displacement from the "vector addition."
__
b) In Euclidean geometry, a vector is a straight-line path. In the real world, we use the term vector to refer to the direction taken by an object, generally along a curved path at some relative distance from the Earth's surface. The direction reference may change along the path, so that following a given "vector" will usually result in a curved path (not a great circle) on the Earth's surface.
__
c) The curved path from a point A to a point B on the Earth's surface will always be longer than the straight-line path between the same two points. In the case of points on opposite sides of the world, the straight-line path is through the center of the Earth, whereas the "vector addition" will be some path along the surface of the Earth.
You need to decide the meaning of "actual trip taken," as any actual trip will generally involve all the changes in direction and ups and downs along the way. If you consider "the actual trip taken" to be the difference between starting and ending coordinates, then the "vector addition" will always be longer.
in solid conductors, what is responsible for the flow of electrical current??
Answers
Answer:
Ussually, soft metals. or solid objects that allow the flow of eletrons.
Explanation:
Electric Current is the flow of electrons through a wire or solution. In a solid the electrons are passed from one positively charged metallic atom to next but in solution the electron is carried by the ions present in the solution. A solution capable of carrying charge is called an electrolyte.
In solid conductors, electron mobility is responsible for the flow of electrical current.
Electron mobility is principally responsible for the flow of electrical current in solid conductors. The subatomic particles known as electrons orbit the atomic nuclei of atoms and are negatively charged. The outermost energy levels of the atoms in a solid conductor, such as a metal like copper or aluminum, have numerous free or loosely bound electrons.
The conductor experiences an electric field that pulls on the free electrons when an electric potential difference (voltage) across its ends is applied (for example, by connecting it to a battery or power source). The electrons are propelled by this force toward the direction of the electric field.
Hence, in solid conductors, electron mobility is responsible for the flow of electrical current.
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Which of the following equations
best represents "y is directly related to the square of x"?
A) y= kx
B) y = kx2
C) y = k(1/x)
D) y = K(1/x2)
Answers
"Y is directly related to the square of x" is represented by the polynomial equation y = kx². A polynomial equation is one that has the polynomial factored down to zero.
What is meant by polynomial equation?Polynomial equations would be those created using exponent, variables, and factors. The greater of its potential exponents is referred to as the equation's degree. By multiplying polynomials as according their degree and the variables in the equation, we can find the solutions.
What is a polynomial equation's degree?The highest or greatest power of a variable in a polynomial equation is referred to as the degree of the polynomial. The degree denotes the polynomial's highest exponential power (ignoring the coefficients).
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If there were no friction, what would happen to the boy who is sliding into home?
Answers
Answer:
If there was no friction it would be impossible to move in any direction other than down.
Explanation:
Friction stops things from sliding apart. If there was no friction everything would slide to the lowest point. It would be impossible to climb up anything. Imagine trying to climb a wall of ice without crampons and an ice pick. It would be impossible.
He would never stop.
Friction rubs one surface against another to generate heat and it slows objects, so if there was no friction, the baseball player would slip and fall and never slow down
Calculate the quantity of heat energy which must be transferred to 2.25 kg of brass to raise its temperature from 20°C to 240°C if the specific heat of brass is 394 J/kgK.
Answers
The quantity of heat energy that must be transferred to 2.25 kg of brass to raise its temperature from 20 °C to 240 °C is 195030 J
How do i determine the quantity of heat energy?First, we shall list out the given parameters from the question. This is shown below:
Mass of brass (M) = 2.25 Kg Initial temperature of brass (T₁) = 20 °CFinal temperature of brass (T₂) = 240 °CChange in temperature of brass (ΔT) = 240 - 20 = 220 °CSpecific heat capacity of brass (C) = 394 J/kgKQuantity of heat energy (Q) =?The quantity of heat energy that must be transferred can be obtained as follow:
Q = MCΔT
= 2.25 × 394 × 220
= 195030 J
Thus, we can conclude quantity of heat energy that must be transferred is 195030 J
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