What provides the centripetal force needed to keep Earth in orbit?

A. inertia

B. its rotation on its axis

C. the gravitational pull of the Sun

D. the gravitational pull of the Moon

How does the size of the nucleus compared to the size of an atom

What is the speed of wave with a frequency of 5Hz and a wavelength of 0.25m?

A net force of 200 N acts on a 100-kg boulder, and a force of the same magnitude acts on a 100-g pebble.

What two processes cycle water from the land to the atmosphere

Two lightbulbs are each connected to a voltage of 120 v. one has a power of 25 w, the other 100 w. which bulb has the higher resistance?

Which of the following has the greatest momentum? A - Truck with a mass of 2250 kg moving at a velocity of 25m/s B - car with a mass of 121010 kg moving at a velocity of 51 m/s C - truck with a mass of six 6120 kg moving at a velocity of 10 m/s

How is a magnetic field generated?

When a bat uses echolocation to determine the distance to an insect, it sends out a sound wave and waits to see how long the sound takes to echo back. Suppose now that a bat hears its echo 0.06 LaTeX: ss after it emitted the sound.

An exhausted bicyclist pedals somewhat erratically when exercising on a static bicycle. The angular velocity of the wheels follows the equation? (t) = at? bsin (ct) fort?0, where t represents time (measured in seconds), a = 0.500 rad/s2, b = 0.

This boy uses a force to lift a heavy rock. (He is carrying it.) What can the boy do if he wants to lift the same rock more quickly? A. use greater upward force B. use greater downward force C. decrease the force of gravity D.