Auniform chain of weight under gravity. prove, with the usual notation, that w per unit length hangs freely =c sec s c tan /, y a length 21 of this chain hangs symmetrically between fixed points a, b and supports a weight wl at its mid-point m. given that the chain at m is inclined at 30° to the horizontal, show that the depth of m below ab is /(/3 - 1), and find the distance ab

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?

If the new moon happens on january 15th, what shape will it be on february 6th?

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.