For the image below, which values for the charges on the two pith balls could be correct? q1 = +3.7 × 10−6 C; q2 = +3.7 × 10−6 C
q1 = −4.0 × 10−6 C; q2 = +3.5 × 10−6 C
q1 = −4.0 × 10−6 C; q2 = −3.5× 10−6 C
q1 = +3.7 × 10−6 C; q2 = 0.0 × 10−6 C

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?