Four cannonballs, each with mass Mand initial velocity V, are fired from a cannon at different angles with the horizontal. Which angular direction of the cannon
produces the greatest projectile height?

A.) 20°

B.) 45°

C.) 70°

D.) 90°

Which of the following is an example of motion in two dimensions?

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign

The two metal spheres in the figure are connected by a metal wire with w switch in the middle. initially the switch is open. sphere 1, with the larger radius, i'd given a positive charge. sphere 2, with the smaller radius, is neutral. then the switch is closed. afterward, sphere 1 has charge q1, is at potential v1 and the electric field strength at its surface is e1. the values for sphere 2 are q2, v2, and e2. a. is v1 < ,> , or = to v2? explain. b. is q2 < , > , or = explain? c. is e1 < ,> ,or = to e2? explain?