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Author Question: On a winter day the temperature drops from 15C to 25C overnight. If a pan sitting outside contains ... (Read 46 times)

deesands

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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


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Briannahope

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Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

b


deesands

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Reply 2 on: Jul 28, 2018
Gracias!

elyse44

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Reply 3 on: Yesterday
Wow, this really help

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