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Questions in physics
📝 Answered - On the seashore, pebbles that are rough and uneven become smooth and rounded. Explain how they become smooth and rounded.
📝 Answered - Blaine skis down a hill at an angle of 12°. He has a mass of 82 kg. What is the normal force on Blaine?
📝 Answered - Identify three different kinds of physical change that could happen to a plastic spoon.
📝 Answered - Does partial reflection and refraction occur when light travels from a slow to fast medium? Explain.
📝 Answered - What is the net force if you push a cart to the right with 5 N of force and a friend pushes the cart to the left with 5 N?
📝 Answered - If the Earth exerts a force of 2100 N on an orbiting communication satellite that is 38 miles above the Earth, what is the magnitude of the force the satellite will exert on the Earth?
📝 Answered - A 2,000-kilogram railroad car moving at 5 m/sec to the east collides with a 6,000-kilogram railroad car moving at 3 m/sec to the west. If the cars couple together, what is their velocity after the collision?
📝 Answered - You hit the wall with a stick. What is the equal but opposite reaction?
📝 Answered - Apply the law of conservation of energy and describe the energy transformations that occur as you coast down a long hill on a bicycle and then apply the brakes to make the bike stop at the bottom. A roller coaster is at the top of a hill and rolls to the top of a lower hill. If mechanical energy is constant, then on the top of which hill is the kinetic energy from the roller coaster's motion greater?
📝 Answered - A mixture of oil and water is place in a glass beaker and stirred.which picture depicts what is most likely to happen after the Beaker sits for 3 minutes?
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