For the electric field shown, which of the following statements describes an increase in voltage? a) a negative charge crosses an equipotential line toward the source charge. b) you cannot tell from the information given. c) a positive charge crosses an equipotential line toward the source charge. d) a positive charge moves along an equipotential line. update: answer is c

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

Which subatomic particle has a negative charge