This job devises a means of measuring the angular diameter of the moon. What is it when the moon is high in the sky? What is it when near the horizon? Estimate the angle separating the moon and sun on a given date and note the moon's phase.
The earth has a radius of 6.38 * 10^6 m and turns on its axis once every 23.9h. A) What is the tangential speed (in m/s) of a person living in Ecuador, a country that lies on the equator? B) At what latitude is the tangential speed one-third that of a person living in Ecuador?
The gravitational force on a body located a distance R from the center of a uniform spherical mass is due solely to the mass lying at distance r<R or r=R, measured from the center of the sphere. This mass exerts a force as if it were a point mass at the origin. Use the above result to show that if you drill a hole through the
A body weighs 98N on a spring balance at the North Pole. What will be its weight recorded on the same scale if it is shifted to the equator? Radius of earth is 6400km