5. George walks to a friend's house. He walks 750 meters North, then realizes he walked too far. He

turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his speed

per second?

A published hypothesis: O is accepted by the scientific community Oshould be tested by the scientific community does not need to be tested Obecomes a scientific law ?

Which best describes the steps involved in the operation of an electric generator?

In an atom where are the electrons with less energy most likely located?

A generator can be powered by falling water. True False

An electron has an negative charge. What is true about the charge of a particle that is attracted to an electron

Consider four objects: A, B, C, and D. If A is negatively charged and B and C attract A but repel each other, what is the charge on B and C? A. Both B and C are positively charged. B. Both B and C are negatively charged. C.

36 kilo-joules to joules?

5 things that will speed up a reaction

Which phase of matter do scientists ignore the forces of attraction between particles? a. solid b. liquid c. gas

A radio-controlled car increases its kinetic energy from 4 j to 12 j over a distance of 2 m. what was the average net force on the car during this interval?