A person throws a ball from height of 6 feet with an initial vertical velocity of 48 feet per second. Use the vertical motion
model, h = - - 16t2 + vt +s, where v is the initial velocity in
feet per second and s is the height in feet, to calculate the
amount of time the ball is in the air before it hits the ground
again. Round your answer to the nearest tenth if necessary.
time in air: seconds

3.1 s

Explanation:

use the quadratic formula

x = −b + √(b2 − 4ac)/2a

where a=-16 b=48 (the velocity) and c=6 (the height)

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.

c. magnitude and direction