What is the theoretical efficiency of a Carnot engine that operates between 600 K and 300 K?
A) 100%
B) 75%
C) 25%
D) 50%
E) 0%
D
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Which characteristic of Venus has led many to call it the "sister planet" to Earth? a. Venus and Earth have very similar atmospheres. b. Venus is almost the same size as Earth
c. Venus and Earth have liquid water on the surface. d. Venus is the same distance from the Sun as Earth. e. Venus and Earth have composite volcanoes.
Diffraction Gratings: A metallic sheet has a large number of parallel slits, 5.0 mm wide and 20 cm apart. This sheet is used as a diffraction grating for microwaves. A wide parallel beam of microwaves is incident normally on the sheet. What is the smallest microwave frequency for which only the central maximum will occur? (c = 3.00 × 108 m/s)
A. 0.50 GHz B. 0.70 GHz C. 1.0 GHz D. 1.5 GHz E. 2.0 GHz
On a planet whose Moon is in the same orbital plane as the planet's orbit around itsstar, how often will solar eclipses occur?
a) Twice every orbit of its moon (twice a month). b) Once every orbit of the planet around its Sun (its year). c) Twice every rotation of the planet (twice a day). d) Once every orbit of its moon (its month). e) Once every rotation of the planet (its day).
A planar loop consisting of seven turns of wire, each of which encloses 200 cm2, is oriented perpendicularly to a magnetic field that increases uniformly in magnitude from 14 × 10^–3 T to 38 × 10^–3 T in a time of 8.0 × 10^–3 s. What is the resulting induced current in the coil if the resistance of the coil is 5.0 ??
a. 1.2E–2 A b. 1.2E+0 A c. 1.3E–1 A d. 8.4E–2 A e. 7.7E–1 A