How does the matter and energy in a system naturally change over time?

A. It increases in energy.

B. It becomes more spread out.

C. It becomes more efficient.

D. It decreases in entropy.

What is the tendency of a material to oppose the flow of charge? A) voltage B) resistance C) potential difference D) current

A person does 100 joules of work in pulling back the string of a bow. what will be the initial speed of a 0.5 kg arrow when it is fired from the bow?

when we turn on a light switch or use the microwave, we use electricity. what are common sources or our electricity?

Which of the following would be valid reason to NOT build the power plant? Geothermal energy is not reliable at favorable sites b) The hot-water reservoirs can be depleted and it can disrupt ecosystems. c) Steam can still cause pollution.

How is radiant energy from the sun converted into electricty

How are magnet'so magnetic force and magnetic field different

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground? A. A bird sat on a telephone wire. B. A woman moved her child from one place to another in a wagon. C.

What types of mediums are involved in the energy transfer

When two frequencies are added together, the beat frequency and the average frequency are an octave apart?

When sunlight strikes oil on the surface of water, a variety of colors are observed. What is the best explanation for this observation? A) Oil reflects the light and the lens of our eyes break it into component colors.