Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion? A ball with a mass of 5 kg B ball with a mass of 10 kg C ball with a mass of 15 kg D ball with a mass of 20 kg

When a spaceship is traveling at 99% of the speed of light (Lorentz factor = 7), an astronomer on board the ship will find thata. everything in the ship weighs seven times more. b. the ship has shrunk to one-seventh its original length. c.

The useful power output of the engine is 2.0 kw. Calculate the rate at which energy is absorbed from the hot reservoir.

A ball is thrown up onto a roof, landing 4 sec later at height of 20m above the release level. The balls path just before landing is angled at 60 degree with the roof. a) find the horizontal distance d it travels.

A cliff diver on an alien planet dives off of a 32 meter tall cliff and lands in a sea of hydrochloric acid 1.20 seconds later. Assuming that the extra-terrestrial's initial speed was zero, what is the free fall acceleration of this strange world?

Its name means indivisible. it is the building block of matter. it is a) an ion. b) an atom. c) an element. d) a molecule.

A golf ball is hit with an initial velocity of 155 ft/s at an angle of 23 degrees with the horizontal. After 1.4 seconds, how far has the golf ball traveled horizontally and vertically?. a. 199.7 feet horizontally and 75.2 feet vertically. b. 60.

What is the kinetic energy (in joules) of a. 2 kg softball thrown at a speed of 40 m/sec? (answer should be in correct units)

How is the information sent back to earth by the robots?

During which change of state do atoms lose energy? sublimation freezing boiling melting

Why does the rotation of earth require people to establish times zones?