In an elastic solid there is a direct proportionality between strain and
a. elastic modulus.
b. temperature.
c. cross-sectional area.
d. stress.
d
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The rate at which energy is transferred is
A) power. B) electromagnetic induction. C) transformation. D) none of the above
The rate of change in a system depends upon the _____________enthalpy.
Fill in the blank(s) with the appropriate word(s).
A certain crystal has an interatomic spacing of 0.142 nm. If a beam of electrons moving with a speed of 1400 m/s is diffracted from this crystal, what is the de Broglie wavelength of the electron?
A) 420 nm B) 130 nm C) 260 nm D) 502 nm E) 520 nm
A space probe approaches a planet, taking measurements as it goes. If it detects a potential difference of 6000 MV between the altitudes of 253,000 km and 276,000 km above the planet's surface,
what is the approximate electric field strength produced by the planet at 264,500 km above the surface? Assume the electric field strength is approximately constant at these altitudes. A) 561 N/C B) 0.261 N/C C) 261 N/C D) 493 ?N/C