An infinite plane of charge with
is tilted at a 45° angle to the vertical direction as shown below. The potential difference, VA ? VB, in volts, between points A and B, a 4.50 m distance apart, is
?
?
a.
?7.06.
b.
?9.98.
c.
?14.11.
d.
+7.06.
e.
+9.98.
e
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Planet A has an orbit with a semi-major axis of 3 Astronomical Units. Planet B hasan orbit with a semi-major axis of 12 Astronomical Units. How does the orbital periodcompare between the two planets? Use P squared = a cubed to estimate.
a) Planet B has an orbital period 64 times longer than Planet A. b) Planet B has an orbital period 4 times shorter than Planet A. c) Planet B has an orbital period 4 times longer than Planet A. d) Planet B has an orbital period 8 times longer than Planet A. e) Planet B has an orbital period 64 times shorter than Planet A.
Why does the high specific heat of water make it useful as a coolant?
What will be an ideal response?
During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit relied largely on rare:
A) total solar eclipses. B) transits of the inferior planets across the Sun. C) passages of comets close to the Earth. D) maximum elongations of Venus. E) oppositions of Mars.
Time Dilation: At age 21, you set out for a star that is 50 light-years from Earth. How fast would your spaceship have to travel in order to reach that star when you are 61 years old? One light-year is the distance light travels in one year.
A. 0.58c B. 0.68c C. 0.78c D. 0.88c E. 0.96c