Somewhere on a distant planet, a simple pendulum is pulled away from the equilibrium point and released. The pendulum comes back to the point of release exactly 2.4 seconds after the release. If the length of the pendulum is 1.3 m, what is the acceleration due to gravity on the planet?

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

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