Homework Clinic

Science Clinic => Physics => Topic started by: deesands on Jul 28, 2018

Title: On a winter day the temperature drops from 15C to 25C overnight. If a pan sitting outside contains ...
Post by: 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

Title: On a winter day the temperature drops from 15C to 25C overnight. If a pan sitting outside contains ...
Post by: Briannahope on Jul 28, 2018

Answer to Question 1

b

Answer to Question 2

b