What is the mass defect of an alpha particle?
a. 
b. 
c. 
d. 
a.
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Are comets common? Explain why or why not
What will be an ideal response?
Gamma rays are emitted when high speed electrons decelerate as they are smashed into a metal target
Indicate whether the statement is true or false
How do we know that pulsars must be neutron stars?
A) Pulsars have the same upper mass limit as neutron stars do. B) No massive object, other than a neutron star, could spin as fast as we observe pulsars to spin and remain intact. C) This is only a theory that has not yet been confirmed by observations. D) We have observed massive-star supernovae produce pulsars. E) Telescopic images of pulsars and neutron stars look exactly the same.
Let's say that a gas decreases in temperature, but that its volume remains constant during this process. What happens to its internal energy in this case?
1.The internal energy decreases. 2.The internal energy increases. 3.The internal energy remains constant. 4.It cannot be determined whether it will increase, decrease, or remain the same.