The zeroth law of thermodynamics pertains to what relational condition that may exist between two systems?
a. zero net forces
c. zero temperature
b. zero velocities
d. thermal equilibrium
D
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Which of the following provides evidence for the quantization of light?
A) Interference effects seen when light passes through a narrow opening B) The individual dots seen on a photographic plate when a photo is taken at extremely short exposure times C) Both of the above. D) Experiments that spread light out into a spectrum of colors E) All of the above.
For a wave on the ocean, the amplitude is:
a. the distance between crests. b. the height difference between a crest and a trough. c. one half the height difference between a crest and a trough. d. how far the wave goes up on the beach.
Nine bulk silicon carbide specimens of the same size were tested and the following strengths were obtained: 22, 26, 33, 50, 29, 56, 58, 41, and 43 MPa.
(a) Plot these data to evaluate the characteristic strength and the Weibull modulus. (b) What is the stress for a 90 % probability of survival for this material?
An object moving at a constant speed requires 6.0 s to go once around a circle with a diameter of 4.0 m. What is the magnitude of the instantaneous acceleration of the particle during this time?
A. 2.2 m/s2 B. 2.7 m/s2 C. 3.3 m/s2 D. 3.8 m/s2 E. 4.4 m/s2