The structure shown in the picture is made of copper. the three thin rods are of equal dimensions. the single main rod is heated to 400 °c and then is brought into contact with the rods p, q, and r. after several minutes, the temperatures of rods p, q, and r are recorded. which option gives the correct values of the final temperatures of rods p, q, and r? a) p = r < q b) p = q = r c) p = r > q d) p = q < r

Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s

Which form of pure carbon is so hard that it can be used in cutting tools?