One complete revolution of Earth around the sun takes about

a.

one rotation.

b.

one season.

c.

one year.

d.

one eclipse.

What is the magnitude of the force a charge 25uc exerts on a charge 3mc 35 cm away?

An object is dropped near the surface of a planet such that the gravitational field at the object's location is 8 Nkg.

An astronomer discovers an object at a distance of 28 Mpc from the Earth. (Recall, M-prefix meaning Mega, i. e. times 106) At this distance, what is the object most likely to be?

How does the skater's potential energy change as he moves down the ramp?

A dog begins walking at a speed of 6 kilometers per hour. After 1 hour, the dog is walking at a speed of 4 kilometers per hour. Which is this an example of?

A rocket with a total mass of 330,000 kg when fully loaded burns all 280,000 kg of fuel in 250 s. The engines generate 4.1 MN of thrust. What is this rocket's speed at the instant all the fuel has been burned if it is launched in deep space?

Un móvil parte del reposo y, al cabo de 5 s, alcanza una velocidad de 5 m/s; a continuación, se mantiene con esa velocidad durante 4 s, y en ese momento frena uniformemente y se detiene en 3 s.

A 2.0-kilogram mass is located 3.0 meters above the surface of Earth. What is the magnitude of Earth's gravitational field strength at this location? (1) 4.9 N/kg (3) 9.8 N/kg (2) 2.0 N/kg (4) 20. N/kg

How long did the astronauts stay on the moon?

Brenda is standing on the beach; the sea is choppy. she observes that the crests of distant waves appear not only smaller, but also closer together than do the crests of waves nearer the beach. this example illustrates a depth cue known as: