Solar energy strikes earth’s atmosphere at 343 w m-2 . about 30% is reflected and the rest is absorbed

The black body temperature of Earth T_e= 180.4 K

Explanation:

Assuming we have to find Black body temperature of the earth.

S0= solar energy striking the earth= 343 Wm^{-2}

\alpaha = 30% = 0.3

\sigma = stephan boltsman constant.= 5.67×10^{-8} Wm^{-2}K^4

T_e= 180.4 K

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.