A tungsten wire is used to determine the melting point of indium. The resistance of the tungsten wire is 3.000 ? at 20.0°C and increases to 4.850 ? as the indium starts to melt. ?tungsten = 4.50 × 10^?3 (°C)?1 . What is the melting temperature of indium?
a. 132°C
b. 157°C
c. 351°C
d. 731°C
b
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What is the most likely reason that there are no giant planets beyond Neptune?
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It is believed that a giant impact may have taken away some of Mercury's low-density crustal rock and left a small, dense world with a(n) large, dense, and _______________ core
Fill in the blank(s) with correct word
The potential difference between the plates of a parallel plate capacitor with the plate separation of 6 cm is 60 V. What is the electric field between the plates of this capacitor?
A) 60 V/m B) 500 V/m C) 1000 V/m D) 2000 V/m E) 3600 V/m
The strongest force between the protons and
neutrons in the nucleus of an atom is the a) gravitational force. b) electromagnetic force. c) nuclear force d) centripetal force.