Author Question: A 5-g coin is dropped from a 300-m building. If it reaches a terminal velocity of 45 m/s, and the ... (Read 149 times)

debasdf · **on:** Jul 28, 2018

A 5-g coin is dropped from a 300-m building. If it reaches a terminal velocity of 45 m/s, and the rest of the energy is converted to heating the coin, what is the change in temperature (in C) of the coin? (The specific heat of copper is 387 J/kgC.)
a. 9
b. 2
c. 5
d. 21
e. 0.5

Question 2

A 300-g glass thermometer initially at 25C is put into 200 cm3 of hot water at 95C. Find the final temperature (in C) of the thermometer, assuming no heat flows to the surroundings. (The specific heat of glass is 0.2 cal/gC.)
a. 52
b. 68
c. 89
d. 79
e. 36