If the activation energy required for a chemical reaction were reduced, what would happen to the rate of the reaction?

a. the rate would increase.
b. the rate would decrease.
c. the rate would remain the same.
d. the rate would go up and down.

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?