The Sun rotales with a period of 24• 7 days and has a radius of 7x18m. For a terestrial observer, calculate the resultant doppler Shift of the wavelength 500 nm which is emitted from the solar equator at; , 1. Each side of the disc. 11. The centre of the solar disc

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

prndulum needs thread, weight clock to time swings