Physics

If a train going 60 m/s hits the brakes, and it takes the train 85 seconds to stop, what isthe train's acceleration?
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The amount of potential energy possessed by an elevated object is:.
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Two equivalent sinusoidal waves travel toward each other on a spring they interfere. What if the waves traveling toward each other aren't sinusoidal but a series of pulses as seen in the picture? What effect does this have on the spring?
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Which statement describes the force diagram? the forces are balanced. the box will move to the right. the box will move to the left. the forces are unbalanced.
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The particles that make up matter are ______, ions or molecules.
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Students in science are studying solutions and the dissolving rate of solids. One group was given some instant lemonade mix to dissolve. They used a packet of lemonade crystals and a packet of lemonade powder. The students dissolved the same amount of each solid into 100 ml of water. They varied the water temperature. List ALL the possible conclusions based the data the students collected?
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Control rods are used to slow down the reaction in the reactor core when the core becomes too hot. please select the best answer from the choices provided t f
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A block of mass 3. 0 kg is hung from a spring, causing it to stretch 12 cm at equilibrium, as shown above. The 3. 0 kg block is then replaced by a 4. 0 kg block, and the new block is released from the position shown above, at which the spring is unstretched. How far will the 4. 0 kg block fall before its direction is reversed?.
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Imagine a situation : If people could not see colours, then how would traffic lights work ? Design a traffic system that does not rely on colors.
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What is the force of the drag for a 65 kg bicyclist, initially at rest at the top of a hill coasts down the hill, reaching a speed of 15.5 m/s at the bottom of the hill. The distance is 60M. neglect any friction impeding the motion and the rotational energy of the wheels. Height is 19MIntial GPE is 12350JKE is 7808J and loss is 4542 J
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What is the tension of the string if the cylinder has an acceleration of
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If a number of coplanar forces acting on a particle are in equilibrium, then
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Compared to the Pacific ocean a cup of hot chocolate has a.more thermal energy and a higher temperature)b.less thermal energy and a higher temperature)c.more thermal energy and a lower temperature)d. less thermal energy and lower temperature (i'll try to give brainliest)
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dont use me for points please i need help, (circuits for physics)
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How much energy does a pair of hair straighteners transfer every second
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When a 10-V battery is connected to a resistor, 2 A of current flow in the resistor. What is the resistor's value
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4. Apply Concepts Which of the two weather stations below is experiencing higher air temperatures? Which is experiencing higher wind speeds?
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Two blocks each of mass m are attached to the ends of a massless rod
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4. Point B on a wheel of radius 40 cm that is rotating at a constant 5. 0 revolutionsper second is located 0. 20 m from the axis of rotation. Pont A is just at the borderof the wheel. See the figure. a) What is the angular velocity of the wheel in rad/s?b) What point has a greater linear speed, A or B? Calculate both speeds andcompare the results. c) What are the centripetal accelerations of points A and B due to the spin of thewheel? Sketch the situation and represent the vectors linear velocity andcentripetal acceleration in points A and B. Assume the rotation of the wheelto be clockwise.
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What is the electric potential energy of a charge that experiences a force of 3. 6 104 N when it is 9. 8 105 m from the source of the electric field? 3. 5 108 J 4. 6 104 J 2. 7 101 J 3. 7 100 J.
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Which choice most accurately traces the flow of electrons in the circuit? this is wrong Electrons move counterclockwise from side B of the battery to side A of the battery through each lightbulb.
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If you wanted to melt ice, then heat it up, and get the water to just barely vaporize, how many equations would you need to solve for the energy used in this procedure?
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What is an exoplanet?
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Which scientist received a nobel prize for the discovery of x-rays?.
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