The quasar that appears the brightest in our sky, 3c 273, is located at a distance of 2.4 billion light-years. the sun would have to be viewed from a distance of 1300 light-years to have the same apparent magnitude as 3c 273. using the inverse square law for light, estimate the luminosity of 3c 273 in solar units.

v=ir = 3x15 =45 v

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

false

hope this : d