When four hydrogen nuclei fuse to make helium, a small amount of ...

[savannahhooper]

When four hydrogen nuclei fuse to make helium, a small amount of matter is lost. What is the mass difference and energy generated? The mass of hydrogen and helium nuclei are 1.67  1027 kg and 6.646  1027 kg, respectively.
 
  a. 0.034  1027 kg, 3  1012 J b. 0.022  1027 kg, 2  1012 J
  c. 0.068  1027 kg, 6  1012 J d. 0.011  1027 kg, 1  1012 J

Question 2

Classical Greek astronomers believed the motions of the heavens could be described by uniform circular motion.
 
  a. True
  b. False
  Indicate whether the statement is true or false

[Viet Thy]

Answer to Question 1

a

Answer to Question 2

True