Which of the following is true regarding the speed of earthquake waves?

You are climbing in the High Sierra when you suddenly find yourself at the edge of a fog-shrouded cliff. To find the height of this cliff, you drop a rock from the top; 8.

Which statement about an electromagnet is true? A. It doesn't function without a source of current. B. The core is made from a nonmagnetic material. C. It uses moving magnets to create an electric field. D.

What part of the Milky Way allows for determination of its rotational direction? A. Celestial body B. Galactic body C. Galactic disk D. Two long tails

How is the work output of a machine calculated a. by measuring the imput force b. by calculating the output distance c. by measuring the output force ny the output distance d. by dividing the input force by the output force

How long would it take for a penny to fall from the top of the Empire State Building? The building is 381 meters.

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