A children's roller coaster is released from the top of a track. If it's maximum speed at ground level is 8 m/s, find the height it was released from

A woman stands in a boat at rest on a calm lake. She throws a 10 kg anchor off the front of the boat, which has a mass of 1,000 kg. What is the initial momentum of the anchor-boat system? A) 1,000 kg m/s B) zero because both objects are at rest.

A child throws a ball perfectly horizontally at the same time a dirt clod falls off it atthe same height above the ground. The clod falls vertically downward.

A stone dropped into a still pond sends out a circular ripple whose radius increases at a constant rate of 2.4 ft/s. (a) how rapidly is the area enclosed by the ripple increasing when the radius is 4 feet? the area is increasing at ft2/sft2/s.

Technician A says if a system fails to alter dwell when it should, the ignition control module needs to be adjusted to correct dwell timing.

What is the cause of atmospheric pressure? The weight of the air minus the buoyancy of the air Solar energy The weight of the air minus the upward sucking force due to the vacuum of space The weight of the air

An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and the rain is falling vertically downward. Originally, the car is empty and moving with a speed of 4.00 m/s.

Photons travel outward from a light bulb in

The critical angle for a beam of light passing from water into air is 48.8°. this means that all light rays with an angle of incidence in the water that is greater than 48.8° will be

A basketball is filled with air and has a small hole. Explain why the basketball would leak.

Aligned magnetic domains are only present in which of the following? A) permanent magnets B) temporary magnets C) all magnetic material D) depends on the situation