Which of the following is a form of matter and not a form of radiation?
A) gamma rays
B) the electron beam that creates the picture on a TV tube
C) X-rays
D) None of the above are forms of radiation.
E) All of the above are forms of radiation.
B
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To what radius would the sun have to be compressed in order for it to become a black hole? The mass of the sun is 1.99 × 1030 kg, G = 6.67 × 10-11 N ? m2/kg2, and c = 3.00 × 108 m/s
A) 2950 m B) 1470 m C) 6.96 × 108 m D) 2.66 × 106 m E) 3.72 × 104 m
How would you "weigh" the astronauts in orbit (where they feel weightless) so that you can keep them in good health?
What will be an ideal response?
Allowing water to cascade or bubble in a fountain during the purification process is an example of
A) a gas dissolving in a liquid. B) a chemical reaction. C) ion exchange. D) a solid dissolving in a liquid. E) only a and b
Which of the following elements is NOT produced in a Type Ia supernova?
A. Neon B. Nickel C. Cobalt D. Iron E. Silicon