A 0.25 kg tuning fork is tied to a string and whirled around in a horizontal circle of radius 0.75 m and at a speed of 5 m/s. How much work is done by the string after 10 rotations?

a. 312.5J

b. 117.8J

c. None

d. Not enough information

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.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y