Which of the following is not a unit of radiation dose?
a. rad
c. rem
b. RBE
d. none of these choices
B
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You are standing near a railroad track and a train is moving toward you at 60 mph and blowing its horn. What will you notice as the train moves past you?
a. As the train approaches, the horn will sound lower in pitch than when the train is moving away. b. As the train approaches, the horn will sound higher in pitch than when the train is moving away. c. There will be no change in the pitch of the horn as it moves by. d. The horn will get louder as the train moves away from you. e. The horn will get quieter as the train moves toward you.
The age of a star cluster can be determined by the luminosity of the main sequence turnoff into the giant stage
Indicate whether the statement is true or false
An object is dropped from a bridge. A second object is thrown downwards 1.0 s later. They both reach the water 20 m below at the same instant. What was the initial speed of the second object? Neglect air resistance
A) 21 m/s B) 9.9 m/s C) 20 m/s D) 15 m/s E) 4.9 m/s
Briefly explain how antimatter can be produced by scientists
What will be an ideal response?