A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time. 1) which ball hits the ground first?

Which composition of water moves to begin a deepwater current?

Why do your hands get warm when you rub them together? (potential energy, centripetal force, friction)

Determine the frequency of light whose wavelength is 4.257 x10-7 cm

At 25°C, sound can travel 100 meters across a football field in 0.29 seconds. Determine the velocity of these sound waves in the direction they travel across the field. A) 0.0029 m s B) 29 m s C) 345 m s D) 34,500 m s

A mineral, like many other types of matter, may exist as a solid, liquid, or gas. True False

A roller coaster is entering a vertical loop which has a radius of 25.0 m. If the coaster is traveling at 45.0 m/s as it enters the loop, how much is the centripetal force that you experience? (Assume your mass to be 75.

Which best describes tropical continental climate during the summer? A. clear, dry weather, B. cloudy, wet weather, C. cold, dry weather, D. hot, dry weather

At the beach, describe where or when you would see wave fronts. How are wave fronts useful to surfers?

How would the moon appear from earth if the moon did not rotate?

Block B has mass 4.00 kg and sits at rest on a horizontal, frictionless surface. Block A has mass 2.00 kg and sits at rest on top of block B. The coefficient of static friction between the two blocks is 0.400.