Give the formula theoretical value - experimental value % error = ×100 theoretical value , calculate the percent error for the experiment.

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

What is the major limitation to the light microscope?