Author Question: On a winter day the temperature drops from 15C to 25C overnight. If a pan sitting outside contains ... (Read 16 times)

deesands · **on:** Jul 28, 2018

On a winter day the temperature drops from 15C to 25C overnight. If a pan sitting outside contains 0.20 kg of ice, how much heat is removed from the ice for this temperature change?
a. 0.1 kcal
b. 1 kcal
c. 4 kcal
d. 0.4 kcal

Question 2

Spectrographic analysis of light from a distant galaxy shows that the galaxy is receding from Earth at v = 0.384 c. Use Hubble's law with H = 17 km/s/106 lightyears to estimate the distance to the galaxy.
a. 3.3 108 lightyears
b. 6.8 109 lightyears
c. 9.9 108 lightyears
d. 2.2 109 lightyears
e. 6.5 106 lightyears