7. Our state of mind affects how we observe our surroundings. What mental state is the best for observing?
I
a) happy
c) nervous
b) relaxed d) excited

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground. what is his gravitational potential energy above the ground?

If the area of a square has increased by a factor of 16, by how much has each side increased?