In order for microwave background radiation to be evidence for the Big Bang, what else must also be trueA singularity must be present at the beginningRed Shift to show the Universe is not expandingA period of cosmic inflation in the first fraction of a secondAn abundance of Hydrogen and Helium

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

answer: 31, 5556. 952 seconds

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.