Conversion of Units: speed of 65 miles per hour is the same as which of the following? (1.00 ft = 30.48 cm)
A. 24 m/s
B. 29 m/s
C. 32 m/s
D. 37 m/s
E. 42 m/s
Answer: B
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Chemically, clean [nonpolluted] air is
A) an isotope. B) a mixture of different compounds. C) an element. D) a compound. E) a liquid.
What type of particle is an electron? (There may be more than one correct choice.)
A) baryon B) hadron C) nucleon D) lepton E) meson
At what rate are photons emitted by a 50.0-W sodium vapor lamp if it is producing monochromatic light of wavelength 589 nm?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
Potential: As a proton moves in a direction perpendicular to the electric field lines
A. it is moving from low potential to high potential and gaining electric potential energy. B. it is moving from low potential to high potential and losing electric potential energy. C. it is moving from high potential to low potential and gaining electric potential energy. D. it is moving from high potential to low potential and losing electric potential energy. E. both its electric potential and electric potential energy remain constant.