Which gives you a frame of reference for your speed when you are riding a train?

the wheels of the train

the sky overhead

the train track

the station

Which of the following is not considered an alternative source of energy? a. solar energy c. geothermal energy b. wind and water energy d. natural gas

For real gases, how does a change in pressure affect the ratio of pv to nrt?

A physicist found that a force of 1.32 N was measured between two charged spheres. The distance between the spheres was 95 cm. Calculate the force between the two spheres when the distance was increased to 1.25 m?

What is the frequency of a wave that has a speed of 0.6 m/s and a wavelength of 0.020 meter?

Car A leaves town heading east with a constant speed of 20 miles/hr. An hour later Car B leaves town heading east as well, with a constant speed of 25 miles/hr. How long after Car B leaves will it intercept Car A?

You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to her house. How far away is her house from where you started?

A boat with an anchor on board floats in a swimming pool that is somewhat wider than the boat. Does the pool water level move up, move down, or remain the same if the anchor is (a) dropped into the water or (b) thrown onto the surrounding ground

In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37,000 km/h.

What conversion factor is needed to change from kilometres to meters

What does the law of universal gravitation state?