Two objects with a mass of 10,000-kg each and a distance of 1 meter between them. a) What is the force of gravity between the two objects?
b) What is the force of gravity if we double one of the masses?
c) What is the force if we doubled both masses?
d) What is the force if we doubled both the masses AND we doubled the distance between the masses?

An uncharged nonconductive hollow sphere of radius 18.0 cm surrounds a 12.0 µc charge located at the origin of a cartesian coordinate system. a drill with a radius of 1.00 mm is aligned along the z axis, and a hole is drilled in the sphere. calculate the electric flux through the hole.

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

How many molecules are present in 3 mols of silicon dioxide (sio2)?