As frequency increases in an electromagnetic wave, its photon energy decreases. A. True B. False

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

so easy. just google the electromagnetic waves and it’ll pop up.

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