Author Question: A 6.5-g iron meteor hits Earth at a speed of 295 m/s. If its kinetic energy is entirely converted to ... (Read 32 times)

jho37 · **on:** Jul 29, 2018

A 6.5-g iron meteor hits Earth at a speed of 295 m/s. If its kinetic energy is entirely converted to the thermal energy of the meteor, by how much will its temperature rise? The specific heat of iron is 113 cal/kg C, and 1 cal = 4.186 J.

A) 92.0 C
B) 57,100 C
C) 0.147 C
D) 384 C

Question 2

If we double the resistance in a circuit but keep the current through it constant, the power dissipated by that circuit will

A) be four times as great.
B) be two times as great.
C) be one-half as great.
D) be one-fourth as great.