#1: the following question appears on a quiz: "a 1.0 l balloon has a pressure of 153 kpa at a temperature of 60°c. how many moles of gas are inside the balloon? " a student answers 0.31 moles. which of the following explanations is true?

a. the student used the wrong value for r, and the answer should be 5.60 moles.

b. the student used the wrong temperature units, and the correct answer should be 0.06 moles.

c. the student's answer is correct.

d. the student used the wrong volume, and the answer should be 5.60 moles.

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field. it is in the opposite direction from that of the original external field. it has a direction determined entirely by the charge on its surface. it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0