An emf is induced in a conducting loop of wire 1.12m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 4.25 seconds and the local 0.105 T magnetic field is perpendicular to the plane of the loop.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?