If the total energy of an electron in an accelerator is three times its rest energy, what is its speed? (c = 3.00 × 10^8 m/s)
a. 2.00 × 10^8 m/s
b. 1.30 × 10^8 m/s
c. 1.41 × 10^8 m/s
d. 2.98 × 10^8 m/s
e. 2.83 × 10^8 m/s
e
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Torque: A 95-N force exerted at the end of a 0.32-m long torque wrench produces a torque of 15 N ? m. What is the angle (less than 90°) between the wrench handle and the direction of the applied force?
A. 30° B. 24° C. 36° D. 42°
European trash has a greater thermal energy content than American trash
What will be an ideal response?
A ray of light enters a pane of glass with an angle of incidence of 
The index of refraction of the glass is 1.48. What is the angle of incidence on the far side of the pane of glass?
A. 
B. 
C. 
D. 
E. 
Which of the following statements about globular clusters is true?
A) Most stars in the cluster are yellow or reddish in color. B) There is an approximately equal number of all types of stars in the cluster. C) All stars in the cluster are approximately at the same stage in their evolution. D) All stars in the cluster have approximately the same mass. E) Most of the stars in the cluster are younger than 10 billion years.