Rotational Dynamics: A torque of 12 N ? m is applied to a solid, uniform disk of radius 0.50 m. If the disk accelerates at 1.6 rad/s2 what is the mass of the disk?
A. 60 kg
B. 45 kg
C. 30 kg
D. 15 kg
Answer: A
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The term "dirty bomb" refers to
A) a bomb that uses conventional explosive to disperse radioactive materials. B) a conventional chemical bomb that disperses pieces of metal in order to harm the maximum number of people. C) a nuclear device that is optimized for the release of radioactive materials. D) a nuclear device that releases neutrons in order to kill people without harming buildings and other structures. E) any nuclear device that is used for terrorist purposes.
A lens called the _______________ is typically used to magnify the image and make it convenient to view distant objects
Fill in the blank(s) with correct word
Which of the following can act like a long-term "thermostat" that helps keep Earth's average temperature fairly stable?
A) radioactive elements trapped in the Earth's mantle B) heat stored in the Earth's magnetosphere C) heat stored in the Earth's liquid core D) the carbon dioxide cycle that moves carbon dioxide between Earth's atmosphere, oceans, and rock
You are given a piece of pie straight out of the oven, so the crust and the filling are at the same temperature. You sample a piece of crust with no problem, but when you put a piece of filling in your mouth, you burn your tongue. Why?
What will be an ideal response?