How does the gravitational force between two objects change if the distance between the objects is doubled?
a. the gravitational force decreases by half.
b. the gravitational force doubles.
c. the gravitational force decreases by a factor of 4.
d. the gravitational force increases by a factor of 4.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Find the mass by adding the numbers from the three sliders

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?