The moon has a diameter of 3.48 x 106 m and is a distance of 3.85 x 108 m from the earth. the sun has a diameter of 1.39 x 109 m and is 1.50 x 1011 m from the earth. determine (in radians) the angles subtended by (a) the moon and (b) the sun, as measured by a person standing on the earth. (c) determine the ratio of the apparent circular area of the moon to the apparent circular area of the sun. these calculations determine whether a total eclipse of the sun is really "total."

0.00903 rad

0.00926 rad

6.268\times 10^{-6}

Explanation:

s = Diameter of the object

r = Distance between the Earth and the object

Angle subtended is given by

For the Moon

The angle subtended by the Moon is 0.00903 rad

For the Sun

The angle subtended by the Sun is 0.00926 rad

Area ratio is given by

The area ratio is

electrical power

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.