-A 180 kg hippo is riding a bicycle at a speed of 6.0 m/s. Out of nowhere, a chimpanzee runs out in the

hippo's path and he must slam on his brakes. If the

bicycle's brakes exert a force of 1600 N, how

long will it take to stop the bicycle? _s

0.0675 seconds

Explanation:

From the question,

We apply newton's second law of motion

F = m(v-u)/t Equation 1

Where F = force exert by the brake, v = final speed, u = initial speed m = mass of the bicycle, t = time.

make t the subject of the equation

t = m(v-u)/F Equation 2

Given: m = 180 kg, u = 6.0 m/s, v = 0 m/s (comes to stop), F = -1600 N ( agianst the dirction of motion)

Substitute these value into equation 2

t = 180(0-6.0)/-1600

t = -1080/-1600

t = 0.0675 seconds.

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

i think it would be 5