What is the mass of an object that weighs 500 newtons on earth?

a. 0 kg

b. 51 kg

c. 512 kg

d. 4900 kg

A maglev train can "float" because magnets in the bottom of the train and on the guideway ... A. have like poles that attract each other B. have unlike poles that repel each other C. have like poles that repel each other

Explain whether an object can have kinetic energy and potential energy at the same time

A conducting material must have many free electrons to qualify as an insulator.

Why do metals often make good conductors?

A magnesium surface has a work function of 2.65 eV. Electromagnetic waves with a wavelength of 280 nm strike the surface and eject electrons. Find the maximum kinetic energy of the ejected electrons. Express your answer in electron volts.

A roller coaster track is a good example of the law of conservation of energy. Use this law to explain these facts about a roller coaster track. a. The largest hill for a roller coaster track is the first hill on the track.

Which statement about the spectrum of light that emerges from a prism is true? A. High-frequency colors bend more than low-frequency colors. B. High-frequency colors bend less than low-frequency colors. C.

What kind of process can create "rogue" waves? a. Constructive interference c. Refraction b. Destructive interference d. Standing waves

What are constellations? 1. Apparent groupings of stars and planets visible on a given evening 2. Groups of galaxies gravitationally bound and close together in the sky 3.

What is pitch? give an example of a high pitch sound a low pitch sound