What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.52) is 28.0°?
a. 18.0°
b. 28.0°
c. 42.6°
d. 45.5°
e. 18.4°
d
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At midnight it is sometimes possible to observe the crescent moon on the meridian
Indicate whether the statement is true or false
An ac generator contains 80 flat rectangular loops of wire, each of which is 12 cm long and 8 cm wide. The loops rotate at 1200 rpm about an axis through the center and parallel to the long side
If the magnetic field in which the loop rotates is uniform, has magnitude 0.30 T, and is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator? A) 20 V B) 27 V C) 35 V D) 29 V
You would have the most quantity of gold if it weighed 1 N on the
1) Moon. 2) Earth. 3) planet Jupiter. 4) would be the same on each. This is because 5) on the Moon a greater mass of gold is required for the gravitational force to equal 1 N. 6) weight and mass are directly proportional to each other. 7) gravitational force per mass is greatest on the most massive planet.
The Moon does not fall to Earth because
1) the net force on it is zero. 2) it is being pulled by the sun and planets as well as Earth. 3) it is beyond the main pull of Earth's gravity. 4) but it does fall! More specifically, the Moon 5) is subject to both centripetal and centrifugal forces. 6) interacts with all massive bodies, both near and far. 7) is free of air resistance as well as other Earthly influences. 8) continually falls around Earth rather than straight into it.