Please help!! Physics

Please help!! Physics

1)You are on a mysterious planet and notice that a 4.1 m long simple pendulum has a period of 3.9 s. Determine the planet’s acceleration due to gravity.

2)A 75 kg rock with a volume of 39 L is completely submerged in water. The density of water is 1 kg/L.

a.) What volume of water is displaced by the r…