Absolute zero is
a. zero degrees Celsius.
b. the temperature at which atoms have no remaining energy from which we can extract heat.
c. the temperature at which water freezes.
d. both a and c
e. none of the above
B
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A simple refracting telescope provides large magnification by employing
A) a short focal length objective and a short focal length eyepiece. B) a short focal length objective and a long focal length eyepiece. C) a long focal length objective and a short focal length eyepiece. D) a long focal length objective and a long focal length eyepiece.
A 2.0 kg ball is moving at 4.0 m/s WEST. The momentum of the ball is
A. 4.00 kg m/s WEST. B. 6.00 kg m/s WEST. C. 8.0 kg m/s WEST. D. 10 kg m/s WEST. E. 12 kg m/s WEST.
Which of the following statements about x-rays and radio waves is not true?
A) X-rays travel through space faster than radio waves. B) X-rays have shorter wavelengths than radio waves. C) X-rays and radio waves are both forms of light, or electromagnetic radiation. D) X-rays have higher frequency than radio waves.
Which of the following is not a sustainable source of materials?
(a) Ore (b) Plants (c) Municipal waste (d) Microorganisms