Which item in the photo is a good thermal insulator, and why? A. The cut vegetables, because they contain a lot of water
B. Human skin, because it is made up mostly of water
C. The plastic handle, because its electrons don't move freely
D. The metal pan, because its electrons move quite freely

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.