Superconductivity is lost when a certain critical temperature is exceeded
a. True
b. False
Indicate whether the statement is true or false
True
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Which of the following stars is a part of the Solar System?
A) The Sun B) Proxima Centauri C) Sirius D) The Pistol Star
Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Both forces are applied perpendicular to the door. Which force exerts the greater torque?
A) the first at the midpoint B) the second at the doorknob C) both exert equal non-zero torques D) both exert zero torques E) Additional information is needed.
What was one of the early experimental confirmations of deBroglie's theory that electrons behave like waves?
a. Niels Bohr's quantitative work with electron orbits in hydrogen atoms. b. Albert Einstein's confirmation that deBroglie's work was sound. c. The discovery of diffraction effects in electron scattering. d. Young's experiments on double slit interference. e. The discovery of varying brightness in spectral signatures.
The intensity of unpolarized light passing through a single sheet of polarizing material changes by a factor of:
a. 1. b. 0.5. c. cos ?. d. cos2 ?.