1. A 1.5-kg cart is pulled with a force of 7.3 N at an angle of 40° above the
horizontal. If a kinetic friction force of 3.2 N acts against the motion, the
cart's acceleration along the horizontal surface will be

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

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.