Normal atmospheric pressure is
a. 14.7 psi.
b. 1 N/m2.
c. zero.
d. 760 mm of mercury.
e. 101,000 pascals.
f. none of the above.
a, d, e
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Two harmonic waves are described by
What is the magnitude of the speed (in m/s) of the two traveling waves?
A. 16 B. 4.0 C. 8.0 D. 0.25 E. 2.0
Which of these could be considered as "hot dark matter"?
A) deuterium B) weakly interacting magnetic particles (WIMPS) C) neutrinos D) dust close to H II regions E) dark energy
Calculate the Earth's angular momentum in the approximation that treats the Earth's orbit around the sun as a circle. (MSun = 1.99 × 10^30 kg; T = 3.156 × 10^7 s; ME = 5.98 × 10^24 kg.)
Wavelengths of light are most efficiently measured in:
a. meters. b. inches. c. millimeters. d. centimeters. e. nanometers.