Comparing radio waves and ultraviolet light, which of the following is true? 1. Radiowaves have lower frequency, same speed, and longer wavelength than ultraviolet light. 2. Radiowaves have higher frequency, same speed, and longer wavelength than ultraviolet light. 3. Radiowaves have lower frequency, faster speed, and shorter wavelength than ultraviolet light. 4. Radiowaves have lower frequency, slower speed, and longer wavelength than ultraviolet light.

Explanation:radio waves have lower frequency, slower speed, and longer wavelength than ultraviolet light

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

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