A brass wire 2.0 m long and 2.0 mm in diameter supports a 10.0-kg fixture. By what distance did this fixture stretch the wire? Young's modulus for brass is 10 × 1010 N/m2
A) 0.11 mm
B) 0.22 mm
C) 0.33 mm
D) 0.62 mm
D
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Light at the peak frequency of an incandescent lamp depends on the
A) amount of electrical energy transformed. B) rate of atomic and molecular vibrations. C) voltage applied to the lamp. D) electrical resistance of the lamp. E) transparency of glass.
What is the period (in hours) of a satellite circling Mars 100 km above the planet's surface?
The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. A) 1.45 h B) 1.00 h C) 1.15 h D) 1.25 h E) 1.75 h
The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is
a. nuclear fission analysis b. nuclear fusion analysis c. neutron activation analysis d. nuclear emission analysis e. beta decay analysis
A spectrum of colors seen in gasoline on a wet street is primarily a result of
1) interference, 2) polarization, 3) refraction, 4) scattering, 5) diffraction, where 6) the light reaching the eye is polarized by double reflection. 7) only the higher frequencies of light resonate with the gasoline and H2O molecules. 8) the thin film of gasoline spreads the light out into its component colors. 9) light reflecting from the gasoline surface interferes with light reflecting from the water surface.