In which of these situations is work done? a. displacement occurs
b. force acts upon an object
c. force and displacement are perpendicular to each other
d. force and an object are perpendicular to each other

What are atoms of the same element with varying number of neutrons

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.

Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums