Two long straight parallel wires are 3 cm apart, as shown in the Figure below. They carry current l1 = 3 A and 12 = 5 A in opposite directions. Draw a vector diagram and find the net magnetic field at point P. Give the answer in the format B = B_î + B, j. Hint: The direction of the magnetic field produced by a current is always perpendicular to the radial line from the current, i. e. directed along a tangent to an arc whose center is at the wire.

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?

Hydrogen and helium are both members of?

What is special about a dc circuit ?