Jenny is doing her homework. When Jenny wrights the pencil exerts a force of 5N on the paper the area of the pencil in contact with the paper is 0.5mm squared calculate the pressure kg the pencil on the paper. Give the unit

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

In an experiment, how can i change human errors? be specific.