Why would physical science be used to study light emitted by a star?

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A. Light is very pretty.

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B. Light is a form of energy.

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C. Stars form interesting shapes in the sky.

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D. The positions of stars control our lives.

If an atom gains two electrons in a chemical reaction, what is its charge? a Question 4 options: -2 -1 +2 +1

Which two statements about an electric motor are true? a. It converts motion energy to electric energy. b. It depends on the relative motion of a magnet and a current-carrying wire. c. It depends on a rotating magnet to create a magnetic field. d.

Explain the value or importance of using the international system of units when describing motion

Which is an example of making a quantitative observation? a. measuring the mass of metal used in a reaction b. recording the color of a solid formed in a reaction c. describing a liquid as having a slippery feel d.

Which two biomes have little precipitation?

A sailboat starts from rest and accelerates at a rate of 0.13 m/s2 over a distance of 458 m. (a) Find the magnitude of the boat's final velocity. m/s (b) Find the time it takes the boat to travel this distance. s

The emission of a Beta particle has the effect of? Decreasing mass by one unit Increasing mass by one unit No change in mass Adding a proton to the nucleus Adding a proton of zero mass to the nucleus

How is the moment magnitude scale used to describe earthquakes?

What force causes warm molten rock to move upward in the mantle? a. Convection c. Refraction b. Radiation d. Conduction

When are magnets attracted and when are they repelled.