If a cosmic-ray proton, an alpha particle, and a 6Li nucleus all have the same kinetic energy, then which one has the lowest speed?
a. the proton
b. the 6Li nucleus
c. the alpha particle
d. All cosmic rays have the same speed, c.
B
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Which of the following is a form of high-level nuclear waste?
A) used nuclear fuel rods B) used water that has been circulating through the core of a reactor C) used protective clothing that has been worn by some nuclear power plant workers D) All of the above. E) None of the above.
Compared to other fundamental forces, the Universal Gravitational Constant G indicates gravity to be a relatively
A) weak force. B) strong force. C) extremely strong force.
An object is placed 15 cm to the left of a convex lens of focal length 20 cm. Where is the image of this object located?
A) 60 cm to the right of the lens B) 60 cm to the left of the lens C) 8.6 cm to the right of the lens D) 8.6 cm to the left of the lens E) 30 cm to the left of the lens
Which of the following describes a nonmetal?
A) poor conductor of electricity
B) shiny
C) malleable
D) ductile
E) good conductor of heat