Tritium (3H) decays to 3He releasing 18.6 keV of energy. How much mass is converted into energy during this process?
A. 
B. 
C. 
D. 
E. 
E.
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The black hole in the core of a Seyfert galaxy consumes the equivalent of hundreds of solar masses a day
Indicate whether the statement is true or false
A ball thrown upwards reaches a maximum height and then comes back down to the original level. As the ball is going upwards, the velocity points __________ and the acceleration points __________
Fill in the blank(s) with correct word
Time Dilation: At age 21, you set out for a star that is 50 light-years from Earth. How fast would your spaceship have to travel in order to reach that star when you are 61 years old? One light-year is the distance light travels in one year.
A. 0.58c B. 0.68c C. 0.78c D. 0.88c E. 0.96c
If you stand in front of a concave mirror, exactly at its focal point,
A) you won't see your image because there is none. B) you will see your image, and you will appear smaller. C) you will see your image at your same height. D) you will see your image and you will appear larger. E) you won't see your image because it's focused at a different distance.