A 5.00-kg object is lifted from the floor to a shelf. The object's new gravitational potential energy relative to the floor is 102 J. What is the height of the shelf?
2.08 m
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A Tungsten w ire is 1.50 m long and has a diameter of 1.00 mm. At 20.°C a current of 50. mA flows through the wire. [?=5.6 × 10-8 ? ? m; ?=0.0045(C°)-1]
(a) Determine the potential across the wire. (b) If the wire temperature increases by 100. C°, what potential is now required to produce a current of 50. mA?
Water pressure at the bottom of a lake depends on the
A) weight of water in the lake. B) surface area of the lake. C) depth of the lake. D) all of the above
A quantity that measures the opposition to the flow of charge is __________
Fill in the blank(s) with correct word
If an element has a band gap of 1 eV between a filled valence band and an empty conduction band, it would be classified as a(n)
A. insulator. B. conductor. C. resistor. D. semiconductor. E. reactor.