A train travels 76 kilometers in 2 hours and then 54 kilometers in 5 hours. What is the average speed?

The Bohr model was determined ultimately to be flawed. Knowing that "opposites attract (and 'likes' repel)," can you think of any flaws in the Bohr model that disobey these statements?

A nonconservative force does the same work regardless of the path taken. True or false?

You hear a sound at 65 dB. What is the sound intensity level if the intensity of the sound is doubled?

Which sentence in the passage can be used to conclude that Eris is a dwarf planet and not a planet? Eris takes about 557 Earth years to orbit the Sun. It has a mean surface temperature of about 40 Kelvin. It has a nearly spherical shape.

Having established that a sound wave corresponds to pressure fluctuations in the medium. True or False

Explain why your weight would be less in the moon than on earth even though your mass would not change. Use the law of universal gravitation in your explanation.

ions are atoms or groups of atoms that have a positive or negative charge. which of the following statements is true of ions?

1. According to the nebular theory, the solar system formed from? A. accretion of protoplanets. B. a large, thin cloud of dust and gas. C. colliding planetesimals. D. all of the above 2.

What is the difference between tangential acceleration and centripetal acceleration?

A ball rolls down a ramp. The ball has a mass of 1 kg and it has 18 joules of kinetic energy. What is the ball's speed?