1. Calculate the weight of a person with a mass of 67.0 kg on the earth (g = 9.80 m/s2) and on Mars (g = 3.71 m/s2). Use this example to describe the differences between mass and weight.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Diamond will scratch quartz. true or false

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?