How does a car's kinetic energy change when it speeds up from 10 to 20 m/s? a. it quadruples. b. it stays the same. c. it doubles. d. it triples.

It quadruples (a)

Explanation:

Kinetic energy is energy due to virtue of motion of a body. For a body in motion, it must possesses velocity.

Kinetic energy = 1/2MV²

M is mass of the body

V is the velocity

If the initial velocity of the body is 10m/s

K.E = 1/2 ×100M1... 1

K.E = 50M1

For the velocity of the body @ 20m/s

K.E = 1/2 × 400M2...2

K.E = 200M2

Equating the values of both KE in 1 and 2 we have;

50M1 = 200M2

M1 = 4M2

M1/M2 = 4

This shows that the car's kinetic energy quadruples )a)

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation:

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.