Two positive charges of 1 X 10-3 C and 1 X 10-5 C are separated by a distance of 10 m. Find the direction and the magnitude of electrostatic force between the charges. Describe the direction in terms of “the charges attract each other,” or “the charges repel each other.” ANSWER: 0.9 N, repulsive

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?

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant