If the distance between two objects decrease and the masses of the objects remain the same, then the force of gravity between the two objects a) decreases. b) increases. c) remains the same. d) increases then decreases.

The correct answer is option B.

Explanation;

The formula of gravitational force is given as:

G = gravitational constant

M, m = Masses of two different objects in which the force is acting.

r = distance between both the objects.

As we can see from the formula that. force of gravity is inversely proportional to the square of the distance between both the objects.

When the distance between the both objects with same masses decreases the gravitational force between them increases.Hence the correct answer is option B.

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m