Which of the following would not be considered a physical property?
A) temperature at which a material catches on fire
B) color
C) conductivity
D) hardness
E) temperature at which a material melts
Answer: A
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An iron core cannot support a star because
A) iron is the heaviest element, and sinks upon differentiation. B) iron cannot fuse with other nuclei to produce energy. C) iron is in the form of a gas, not a solid, in the center of a star. D) iron supplies too much pressure. E) iron has poor nuclear binding energy.
The ______________ calendar is most used around the world
a. Roman b. Julian c. Gregorian d. Babylonian
A hospital patient has been given a sample of 131I , which has a half-life of 8.04 days. This sample is decaying at 5.9 times the acceptable level for exposure to the general public
How long must the patient wait for the decay rate of the sample to reach the acceptable level? A) 21 days B) 14 days C) 9.9 days D) 8.9 days
Acceleration is the time rate of change of what?
a. distance b. speed c. displacement d. velocity