Some constellations, such as Ursa Minor, are visible in the sky year-round; other constellations appear for only part of the year. Explain why this happens.

A hockey puck with a mass of 0.35 kg slides across the ice after a slap shot toward the goal. If the puck decelerates at 7.8 m/s/s, what is the coefficient of Friction between the ice and the puck?

mackinzie walks 4 blocks west, then 2 blocks south, then 4 blocks east, and, finally, 1 block south. what is the magnitude of her total displacement (in blocks) ?

Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal, X-ray light is transmitted through the metal, and visible light is reflected off the metal.

What are materials used in photosynthesis?

In order to qualify for the finals in a racing event, a race car must achieve an average speed of 223 km/h on a track with a total length of 1350 m.

A piano emits frequencies that range from a low of about 28 hertz to a high of about 4200 hz. find the range of wavelength in air attained by this instrument when the speed of sound in air in 342m / s

Which statement is true about a polarized object? A) It gains electrons and becomes negatively charged. B) It gains protons and becomes positively charged. C) The number of positive and negative charges can be the same. D) It has to be a metal.

Define the law of conservation of momentum in one sentence

A shopping cart rolls from x=19.9m to x=5.40m with an average velocity of - 0.418m/s. How much time did it take? (unit=s)

Where does the energy of a nuclear power plant come from?