You drop a rock off of a building. It takes 4.5s to hit the ground. How tall is the building?

What happened when electricity flows through an object

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is able to rotate the ball at the rate of 8.00 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.

What is similar about Darwin and Lamark's theories?

What is the example of indirect competition for resources

Which would react chemically by forming an ionic bond A) 2 chlorine atoms with 7 valence electrons each B) 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C) 1 sodium atom with 1 valence electron and 1 chlorine atom

If it has enough kinetic energy, a moleculeat the surface of the Earth can escape the Earth's gravitation. The acceleration of gravity is 9.8 m/s2, and the Boltzmanns' constant is 1.38066*10-23 J/K.

True or False. Alcohol is toxic to most fruit flies, but fruit flies that metabolize alcohol quickly survive alcohol exposure better than normal metabolizers.

Aerobic exercise is exercise where oxygen is not present. Question options: True False

The force between a pair of. 005 charges is 750 N. What is the distance between them?

A perpetual motion machine can never be built because it is not possible to eliminate A) Momentum B) Inertia C) Elasticity D) Friction