Which of these is necessary to make an electric circuit?

a

a battery

b

a copper wire

c

a light bulb

d

a closed path

A tape dispenser is an example of which simple machine pulley lever inclined plane screw

Any discard solid material

The center of the Milky Way galaxy lies in the direction of the _constellation, aboutlight-years away.

Which of the following is an important part of scientific methods? A. using calculators B. Teaching others C. Traveling to different places D. Making hypothesis

Large, flat areas on the Moon's surface once thought to be remnants of ancient seas

What is the difference between speed and velocity and give an example.

Water flows over a section of niagara falls at the rate of 1.2x10^6 and falls 50.0 m. how much power is generated by the falling water

What is the darkest side of the moon called?

Brian is a healthy young man. He has been training with his teammates for a 50-yard dash for months. However, even with practice, he cannot run fast enough to qualify. What is the most likely reason that Brian can't qualify?

1. Are BEVs or hydrogen fuel cell vehicles a more promising transportation technology for the future? 2. Should car companies be required to produce electric cars?