The moon Ariel orbits Uranus at a distance of 1.91 x 108 m once every
2.52 days. Use that data to calculate
the mass of Uranus.
[?] x 10"??kg
Second Blank (Power)

Why does lightning travel from clouds to the ground?

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.

When solid surfaces slide over each other the kind of friction that occurs is called friction