Suppose a train car moving down a track at 10 m/s collides with another train car that is moving. Explain how momentum is conserved after the collision.

The people in a location in Florida have reduced their water usage drastically since the last few months. People are taking shorter showers, turning off lawn sprinklers, and reusing water left over from cooking.

If the wavelength is doubled what happens to the period

48. Protons have ___ charge, neutrons have ___ charge, and electrons have ___ charge. A. negative; positive; no B. positive; no; negative C. positive; negative; no D. negative; no; positive E. no; negative; positive

A common characteristic of sound waves is that they A. Are created by vibrations B. Travel in straight lines toward the source C. Travel fastest through empty space D. Move at the speed of light

Who first described the double-helix structure of DNA?

What is the name of the area surrounding earth that is influenced by earth's magnetic field?

A 15 g turntable is covered with a uniform layer of dry ice that has a mass of 9.0 g. The angular speed of the turntable and dry ice is initially 0.75 rad/s. What is the angular speed of the turntable once all the dry ice has evaporated?

Rainwater was collected in water collectors at thirty different sites near an industrial basin and the amount of acidity (pH level) was measured. The mean and standard deviation of the values are 4.60 and 1.10 respectively.

A hot air balloon is rising straight up at a constant speed of 7 m/s. when the balloon is 12.0 m/s above the ground, a gun fires a pellet straight up from ground level with an initial speed of 30.0 m/s.

The atmosphere is an). O element O molecule O mixture O compound