A light-year is а bout: 6 million miles 6 million kilometers 6 billion miles 6 trillion miles

A bicycle travels 15 km in 30 minutes. What it's is average speed in km per hour

What are waves that require a medium to propagate known as? A. transverse waves B. mechanical waves C. circular waves D. electromagnetic waves

A battery powered electric motor uses what type of current?

as a car drives past a person standing on a sidewalk, the driver keeps a hand on the horn. how does the pitch of the horn differ for the driver and the person standing on the sidewalk?

Which one of the following will not generate electromagnetic waves or pulses? (A) an alternating current (B) an accelerating electron (C) a proton in simple harmonic motion (D) a direct current (E) charged particles traveling in a circular path in a

The radius of a car wheel is 3 inches. how far will the car travel in 10 revolutions of the wheel?

What happens to a muscle when you exercise it?

A certain rain cloud at an altitude of 1.80 km contains 3.20 107 kg of water vapor. How long would it take for a 2.90-kW pump to raise the amount of water from Earth's surface to the cloud's position?

The law of conservation of energy states that A) energy may be created, destroyed or transformed. B) energy may be created, but only in certain types of nuclear reactions. C) energy may neither be created nor destroyed; it may only be transformed.

Pushing a rock from a hill top is called