Acceleration involves a change
in
A. time
B. direction
C. speed
D. either b or c

C

Explanation:

Think about it. If you accelerate, you go faster. This means you change speed.

The answer is D. Acceleration involves a change in direction and speed.

Explanation:

Since velocity (speed of something) is a vector (direction),it can change either in magnitude or in direction.

i have a feeling this is a gay person trolling to make straights look bad.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates