Power is
a. work divided by time.
b. velocity multiplied by time.
c. momentum divided by time.
d. energy multiplied by time.
a
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Stefan's law notes that total energy radiated is proportional to the ________ power of the temperature of the blackbody
Fill in the blank(s) with correct word
An aluminum alloy with 4 wt % copper is to be precipitation-hardened. The alloy is solution-treated and quenched, and after the quench the shear yield strength is 38 × 106 Pa. Assume that the copper atoms remain in solid solution after the quench. The alloy is then artificially aged to a shear yield strength of 180 × 106 Pa. Determine the spacing between the precipitate particles that could produce this increase in yield strength. The shear modulus of this alloy is 27 × 109 Pa, the lattice parameter (a) of the aluminum alloy is 0.404 × 10-9 m, and aluminum is FCC with an atom at each lattice site.
What will be an ideal response?
Suppose you have two capacitors and want to use them to store the maximum amount of energy by connecting them across a voltage source. You should connect them
A) in parallel across the source. B) in series across the source. C) It doesn't matter because the stored energy is the same either way.
A hypothetical particle has a mass of 510 MeV/c2. If such a particle at rest decays into two gamma-ray photons, what is the wavelength of each photon?
(1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J? s)