Answer:
2kg
Explanation:
100N = Force 50m/s²= Acceleration
Mass=?
the equation is;
Mass(kg)= Force(N) ÷ Acceleration (m/s²)
100÷50=2
what is wavelength ??? sound is heard louder in newly furnished room why?
Answer:
Wavelength is the distance fromone crest to another or from one troughtto another of a wave is called wavelength.
Which of the following is true of the Celsius scale? a. 212 degrees is the boiling point of water. b. 0 degrees is absolute zero. c. 0 degrees is the freezing point of water. d. 32 degrees is the freezing point of water. Please select the best answer from the choices provided A B C D
Answer:
it is C on NCCA Quiz
Explanation:
Answer:
The correct answer is C., or ¨0 degrees is the freezing point of water¨.
If a galaxy contains a great deal of dark matter, then, compared to the mass-to-light ratio of the inner part, the mass-to-light ratio of the whole galaxy will be
If a galaxy contains a great deal of dark matter, then the mass-to-light ratio of the whole galaxy will be higher compared to the mass-to-light ratio of the inner part.
The mass-to-light ratio of the whole galaxy will be higher because dark matter does not emit light and therefore, increases the total mass of the galaxy without contributing to the overall light output. The presence of dark matter affects the rotation curves of galaxies and their gravitational lensing properties, indicating its significant contribution to the overall mass of galaxies.
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9.Two cars have a rear-end collision. A 1200 kg Honda moving at 20 m/s strikes a 1000 kg Ford moving at 15
m/s. Their bumpers become locked and they continue to move as one mass. What is their final velocity?
Answer:
The final velocity of the Honda-Ford system is 17.727 meters per second.
Explanation:
According to the statement, there are no external forces acting on both cars, so there is an entirely inelastic collision between the Honda car and the Ford car, whose final velocity can be determined by solely using the Principle of Linear Momentum Conservation. A rear-end collision mean that both cars move in the same direction:
\(m_{H}\cdot v_{H} + m_{F}\cdot v_{F} = (m_{H}+m_{F})\cdot v\) (1)
Where:
\(m_{H}\) - Mass of the Honda car, in kilograms.
\(m_{F}\) - Mass of the Ford car, in kilograms.
\(v_{H}\) - Initial velocity of the Honda car, in meters per second.
\(v_{F}\) - Initial velocity of the Ford car, in meters per second.
\(v\) - Final velocity of the Honda-Ford system, in meters per second.
If we know that \(m_{H} = 1200\,kg\), \(m_{F} = 1000\,kg\), \(v_{H} = 20\,\frac{m}{s}\) and \(v_{F} = 15\,\frac{m}{s}\), then the final velocity of the Honda-Ford system is:
\(m_{H}\cdot v_{H} + m_{F}\cdot v_{F} = (m_{H}+m_{F})\cdot v\)
\(v = \frac{m_{H}\cdot v_{H}+m_{F}\cdot v_{F}}{m_{H}+m_{F}}\)
\(v = 17.727\,\frac{m}{s}\)
The final velocity of the Honda-Ford system is 17.727 meters per second.
Which solution has the greatest number of hydrogen ions?
blood, pH = 7.2
lemon juice, pH = 2
soda, pH = 3.5
bleach, pH = 13.5
Answer:
lemon
Explanation:
the lower the number the hier hydrogen ions
Answer: B
Explanation:
What makes cells. Dont answer that I already know what it is. I just wanted to give people some points. lol have a nice day.✌
Thank you for the pointsss
The solar wind is highly ionized plasma. Throughout its trajectory, it presents variations in temperature, density, pressure and speed, mainly due to the presence of eruptive phenomena such as Coronal Mass Ejections (CME). Assuming that on its journey between the Sun and the Earth (150X10^6 km), the temperature (1.3X10^5 K) and speed (450 km/s) remain constant. What kind of fluid is it? When an EMC is generated, the temperature (10^7 K) and the speed of the Solar Wind (10^3 km/s) increase and assuming that this increase remains constant along the same trajectory, what type of fluid will be the Solar Wind thanks to this disturbance?
laminar fluid <2100
transition 2,100-4,000
turbulent fluid >4000
Re=(Velocity)(Length)/ VISCOSITY
calculate the viscosity depending on the temperature
and explain in words the solution of the problem.
The solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma.
Due to the increase in temperature (10^7 K) and speed (10^3 km/s) during a Coronal Mass Ejection (CME), the solar wind becomes a turbulent fluid.The solar wind, which is a stream of charged particles (plasma) emitted by the Sun, exhibits characteristics of a highly ionized plasma. As it travels from the Sun to the Earth, the solar wind encounters variations in temperature, density, pressure, and speed. In this case, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, the solar wind can be classified as a highly ionized plasma.
During a Coronal Mass Ejection (CME), eruptive phenomena on the Sun's surface cause a sudden release of a large amount of plasma and magnetic fields into space. This disturbance leads to an increase in the temperature of the solar wind to around 10^7 K and an increase in its speed to approximately 10^3 km/s. This enhanced energy and velocity result in a significant disruption of the solar wind's flow, making it a turbulent fluid.
Turbulent fluids are characterized by chaotic and irregular motion, with strong fluctuations and mixing. The increased temperature and speed during a CME generate turbulent behavior within the solar wind, leading to the disruption and mixing of plasma particles along its trajectory.
To determine the type of fluid flow, the Reynolds number (Re) is often used. It relates the flow's characteristics, such as velocity and length, to the fluid's viscosity. In this case, since the solar wind is a plasma and has negligible viscosity, the Reynolds number is extremely high, well above the turbulent threshold of 4000. Therefore, the solar wind with increased temperature and speed due to a CME can be classified as a turbulent fluid.
In summary, the solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma. However, during a Coronal Mass Ejection (CME), the temperature and speed of the solar wind increase significantly, leading to turbulent fluid behavior.
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A ball of mass 0.12kg is hit by a tennis player. The velocity of the ball changes from 0m/ s to 5.0m/s in 0.60s. What is the average resultant force acting on the ball while it is being hit?
A 1.0N B 2.5N C 3.6N D 8.3N
(Please add explanation)
Answer:
A. 1.0NExplanation:
According to Newton's second law
F = ma
m is the mass = 0.12kg
a is the acceleration = v-u/t
a = 5-0/0.6
a = 5/0.6
a = 8.333m/s²
Get the force
F = 0.12 * 8.333
F = 1.0N
Hence the average resultant force acting on the ball while it is being hit is 1.0N
50 points!!!! please help me!!!!
What makes it possible for CFCs to travel up to the ozone layer and begin destroying ozone?
Answer:
CFCs reach the stratosphere because the Earth's atmosphere is always in motion and mixes the chemicals added into it. This is because winds and other air motions mix the atmosphere to altitudes far above the top of the stratosphere much faster than molecules can settle according to their weight.
Explanation:
Which type of statement has the form "If A, then B?
O A. Conditional
B. False
C. True
D. Deductive
SUNMIT
Answer:
The correct answer is A. Conditional.
Explanation:
A statement of the form "If A, then B" is called a conditional statement. It represents a logical relationship between two propositions, where A is the antecedent (or premise) and B is the consequent (or conclusion).
If a riding lawnmower engine exerts 19 hp in one minute to move the mower, how much work is done? (Hint convert: 1 watt equals 0.00135962 hp)
Answer:
Work done = 838470 Joules.
Explanation:
Given the following data;
Power = 19 hp
Time = 1 minute to seconds = 60 seconds.
Next, we would convert the unit of power in "hp" to "Watt."
1 Watt = 0.00135962 horsepower
x Watt = 19 horsepower
Cross-multiplying, we have;
19 = 0.00135962x
x = 19/0.00135962
x = 13974.5 Watts.
Now, to find the work done in moving the mower;
Work done = power * time
Substituting into the formula, we have;
Work done = 13974.5 * 60
Work done = 838470 Joules.
Compare how radiowaves and gamma rays are produced ( 6 marks )
When compared to each other, radio waves are produced by the movement of negatively-charged electrons whereas gamma rays are produced in nuclear reactions.
How are radio waves and gamma rays produced?The back-and-forth movement of negatively charged electrons inside an antenna produces radio waves.
Radio waves have the longest wavelengths of all the waves in the electromagnetic spectrum. Radio waves are typically found at frequencies of 300 gigahertz and below.
On the other hand, nuclear explosions, lightning, and radioactive decay generate gamma rays.
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In 1912, Alfred Wegener proposed his continental drift theory and was widely rejected. Imagine if you had to assist Wegener in proving that we live on huge plates that are constantly in motion. Luckily, you also have provided resources such as videos and articles to compile your evidence and help Wegener. Present your research using an interactive PowerPoint or Storyboard while answering the below questions.
1. What does the theory of plate tectonics state?
2. What was Pangaea?
3. Why was Wegener's original idea about continental drift referred to as intuition and not science?
4. What did Wegener find that he believed was evidence to support his theory?
Evidence for plate tectonics
Research the evidence that scientists used to prove the theory that continents move.
Research rock formation evidence and give examples.
Research fossils evidence
o Research fossil evidence of the following organisms: Glossopteris, Mesosaurus, Cynognathus and Lystrosaurus. Summarize the type of organisms, their habitat and climate conditions.
5. Research evidence from glaciers and coal deposits.
Answer:
1. The theory of plate tectonics states that the Earth's outer shell is divided into several plates that move and interact with each other. These plates are made up of the Earth's crust and the upper part of the mantle, and they move due to the convection currents in the mantle.
2. Pangaea was a supercontinent that existed about 300 million years ago. It was made up of all the continents that we know today, and it began to break apart about 200 million years ago.
3. Wegener's original idea about continental drift was referred to as intuition and not science because he did not have a mechanism to explain how the continents moved. Additionally, he did not have enough evidence to support his theory.
4. Wegener found several pieces of evidence that he believed supported his theory of continental drift. He noticed that the coastlines of South America and Africa fit together like puzzle pieces, and he also found similar rock formations and fossils on both continents.
Evidence for plate tectonics:
Rock formation evidence: Scientists have found similar rock formations on different continents that were once connected. For example, the Appalachian Mountains in North America and the Caledonian Mountains in Europe have similar rock formations.
Fossil evidence: Scientists have found fossils of the same species on different continents that were once connected. For example, the Glossopteris plant was found in South America, Africa, India, Australia, and Antarctica. This suggests that these continents were once connected and had similar climates.
Glossopteris: Glossopteris was a plant that lived about 250 million years ago. It was found on several continents that were once connected, including South America, Africa, India, Australia, and Antarctica. This suggests that these continents were once connected and had similar climates.
Mesosaurus: Mesosaurus was a freshwater reptile that lived about 300 million years ago. Its fossils have been found in South America and Africa, which suggests that these continents were once connected and had similar habitats.
Cynognathus: Cynognathus was a carnivorous mammal-like reptile that lived about 250 million years ago. Its fossils have been found in South America, Africa, and Antarctica, which suggests that these continents were once connected and had similar habitats.
Lystrosaurus: Lystrosaurus was a herbivorous mammal-like reptile that lived about 250 million years ago. Its fossils have been found in South America, Africa, India, and Antarctica, which suggests that these continents were once connected and had similar habitats.
Glacier and coal deposit evidence: Scientists have found evidence of glaciers and coal deposits in areas that are now near the equator. This suggests that these areas were once located near the poles and have moved due to plate tectonics. Additionally, coal deposits found in Antarctica suggest that it was once located in a warmer climate.
It is not possible to get a perfect Machine in our practice, why?
No machine is perfect because some part of the work done on a machine is always used up or wasted in overcoming the friction between the moving parts of the machine. If a machine is 80% of the work input to the machine is obtained as the useful work output.
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Please pass this on... ( #helpsavelives )
Who ever is reading this: I love u. U matter.
The world needs u hang in there ik it may be bad but u deserve the world
Answer:
Awww <3 you too! You matter too! thanks for the message!
Explanation:
A crate of mass m1 = 13.00 kg is pulled by a massless rope up a 36.9° ramp. The rope passes over an ideal pulley and is attached to a hanging crate of mass m2 = 16.30 kg. The crates move 1.41 m, starting from rest.Find the work done by gravity on the sliding crate.
The free body diagram of the system can be shown as,
The work done by gravity on sliding crate can be given as,
\(W=(m_1g\sin \theta)dcos180^{\circ}_{}\)The angle between distance and force is 180 because the force acts in the downward direction whereas the block slide in the upward direction.
Substitute the known values,
\(\begin{gathered} W=(13.0kg)(9.8m/s^2)\sin 36.9^{\circ}(1.41\text{ m)(-1)(}\frac{1\text{ J}}{1kgm^2s^{-2}}) \\ =-(179.634\text{ J)(}0.6) \\ \approx-107.8\text{ J} \end{gathered}\)Thus, the work done by gravity on the sliding crate is -107.8 J.
simple machines are in a mousetrap
Answer:
A mousetrap makes use of a simple machine called a lever.
Explanation:
In a second-class lever the effort force is at the other end, with the load in the middle. In a third-class lever, the load is at the end and the effort force is between the fulcrum and the load. When you set the mousetrap, you are using a second-class lever. Sorry if I get this wrong. I am in 5th grade! ♥
12 A car travels in a straight line at speed v along a horizontal road. The car moves
against a resistive force F given by the equation
F = 400+kv²
where F is in newtons, v in ms-1 and k is a constant.
At speed v = 15ms-1, the resistive force F is 1100 N.
a
Calculate, for this car:
i the power necessary to maintain the speed of 15ms-¹,
ii the total resistive force at a speed of 30 ms-¹,
iii the power required to maintain the speed of 30ms-¹.
Answer:
i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii) Find the value of k first: F = 400 + k(15^2) k = 28/9 F = 400 +(28/9)(30^2) = 320
Explanation:
Transfer Functions of Electrical Systems (Special assignmen 3) There are 4 possible types of transfer functions for electrical systems. 1) Voltage Gain H_V(s) Vi(s) Electrical System V.(s) 2) Transfer Admittance H_Y(s) Vi(s) + +1 Electrical System I.(s) 3) Current Gain H_I(s) L(S) (1) 4) Transfer Impedance H_Z(s) L(S) (1) Electrical System Electrical System V.(s) I.(s) R = 12.50, L= 4H, C = 0.01F R + Vi(t) L CT Vo(t) 1) Find Vc(s)/Vs(s). 2) Show the pole-zero map. 3) Find the response to Vs(t) = u(t)V. 4) Find the response to Vs(t) = o(t)V.
The transfer function is Vc(s)/Vs(s) = (R + 1/(sC)) / (sL + R + 1/(sC)), the pole-zero map includes poles at -R/L and zeros at -1/(sC), the response to Vs(t) = u(t)V can be calculated using inverse Laplace transform techniques and the response to Vs(t) = o(t)V can also be determined using inverse Laplace transform techniques.
To find Vc(s)/Vs(s), we need to consider the given electrical system with components R, L, and C. By applying Kirchhoff's laws and solving for the output voltage Vc(s) and input voltage Vs(s) in the Laplace domain, we can derive the transfer function as (R + 1/(sC)) / (sL + R + 1/(sC)).
The pole-zero map provides insights into the stability and behavior of the system. In this case, the transfer function has poles at -R/L, indicating a time constant associated with the system's dynamics. The transfer function also has zeros at -1/(sC), which affect the frequency response characteristics.
To find the response to Vs(t) = u(t)V, where u(t) represents the unit step function, we can apply inverse Laplace transform techniques to the transfer function Vc(s)/Vs(s). This will yield the time-domain response of the system to a step input.
Similarly, to find the response to Vs(t) = o(t)V, where o(t) represents the unit impulse function, we can use inverse Laplace transform techniques on the transfer function Vc(s)/Vs(s). This will give us the time-domain response of the system to an impulse input.
By calculating the inverse Laplace transforms of the transfer functions in cases 3) and 4), we can obtain the time-domain responses of the electrical system to the respective inputs.
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The car has a mass of 22,000Kg. Calculate the force needed to stop the car.
Answer:
Momentum of car = 1200 kg * 10 m/s = 12000 kgm/s Momentum = Force * time 12000 kgm/s = Force * 20s Force = 600 N
Explanation:
1. A 500.0 g metal block absorbs 5.875 × 103 J of heat to raise its temperature by 50.0 K. What is the substance? Show your work.
Specific Heats of Selected Substances
Substance
C [J/(kg·K)]
Water (ice)
2,060
Iron
450
Aluminum
897
Gold
130
Copper
385
Silver
235
Ammonia (liquid)
4,700
Water (liquid)
4,180
Water (steam)
2,020
Lead
128
The name of the substance is silver based on the specific heat capacity value.
What is the specific heat capacity of the substance?The specific heat capacity of the substance is calculated by applying the following formula for heat capacity.
Q = mcΔθ
where;
m is the mass of the substancec is the specific heat capacity of the substanceΔθ is the change in temperaturec = Q / mΔθ
The specific heat capacity of the substance is calculated as;
c = (5875 J ) / ( 500 g x 50 )
c = 0.235 J/kgK
The substance that has the same specific heat capacity calculated above is silver.
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A squirrel jumps into the air with a velocity of 7 m/s at an angle of 20 degrees. What is the maximum height reached by the squirrel?
Answer:
.3m
Explanation:
Apex
0.3 is right i just got it right on the test for A P E X :D
What must occur for neutral chargers to occur
You are trying to push a 70kg crate out the back door. The force of friction between the crate and the floor is 275 N, and you push horizontally. How hard must you push to move the crate with a constant speed? If you push with a force of 380 N, what will be the crates acceleration? If her crates moved from rest, what will be the crate’s final velocity if you push with a force of 380 N for 6s?
(a) The acceleration of the crate is 1.5 m/s^2
(b) The crate’s final velocity is 9 m/s.
What will be the crates acceleration?
To move the crate with a constant velocity, the force you apply must equal the force of friction. So, to move the crate, you must push with a force of 275 N.
If you push with a force of 380 N, the net force on the crate will be;
F (net) 380 N - 275 N = 105 N.
The acceleration of the crate will be given by Newton's second law of motion:
a = F / m
where;
a is the acceleration, F is the net force, and m is the mass of the crate.So, substituting in the known values, we get:
a = 105 N / 70 kg = 1.5 m/s^2
Finally, if the crate started from rest, its final velocity after 6 seconds can be found using the equation:
v = at
v = 1.5 m/s^2 x 6s = 9 m/s
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What is the equivalent resistance (total resistance) of the series circuit shown?
I NEED THE RIGHT ANSWER ASAP NO LINKS !!!
This is a Science question
Answer:
the second one
Explanation:
cus 6-8= -2
what is the slope of (3,4) and (5,6)
Answer:
1
Explanation:
Answer this please ASAP!!
110 is the answer to the question
Answer:
dont run away
Explanation:
a magnet can hold a piece of paper to the door of a refrigerator. how does the magnet stick without touching the door?
A refrigerator door can be attached to a sheet of paper using a magnet. How does magnet adhere to the door without touching it, The door is drawn to the magnet by gravity.
Why does a magnet attract something without really touching it?A magnet has a magnetic field surrounding it that pushes or pulls objects inside of it that are formed of iron, nickel, or cobalt as well as other magnets. The Earth is enveloped by the a magnetic field and affects objects composed of magnetization, such as compasses, since its interior behaves like a magnet.
Why doesn't paper attract magnets?The magnetism of most things is cancelled out by the equal amounts of electrons that spin in opposing directions. Because of this, substances like fabric and paper are referred to as weakly magnetic. The majority of electrons in materials like iron, cobalt, or nickel spin in a similar way.
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What type of system would allow light and air to enter and exit? A. Connected
B. Closed C. Isolated D. Open
Answer:
An open system.
Explanation:
An isolated system allows the exchange of neither energy nor matter with the surroundings. A closed system allows the exchange of energy, but not matter. An open system allows the exchange of both energy and matter.
Notice that in this question, light (electromagnetic wave) is a form of energy. The entry and exit of light allows this system to exchange energy with its surroundings- just as how the earth receives energy from the sun. Additionally, this system could exchange energy with its surroundings through the exchange of matter (in particular, air) with its surroundings.
Thus, the system in this question is an open system.