Planet x has a mass three times that of earth and a radius twice that on earth. a) Show that acceleration due to gravity on any planet is given g= GM/r sqaured where G is the universal gravitational constant and M is the mass of the planet.
b) If the acceleration due to gravity is 9.8m•s squared on earth, determine the acceleration due to gravity on planet x.​

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs

Write a polynomial function with the given zeros x= -1,0,2show your work

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.