Light with enregy flux of 18 W `cm^(-2)`,find the average force the surface has an area of `20 cm^2`,find the average force exerted on the surface during a 30 minutes time span.

Light with enrgy flux of 9 xx 10^5 W m^(-2) falls of a non - refleting surface at normal incidence.If trhe surface has an area of 50 cm^2 ,find average force exerted on the surface during an intervl of 10 minutes.How will the result get modified ,if the surface is a perfect reflector?

find the radius of a sphere whose surface area is 154 cm^(2)

Find the radius of a sphere whose surface area is 154 cm^2 .

Find the volume of a sphere whose surface area is 154 cm^2 .

Find the side of a cube whose surface area is 600 cm^2 .

Find the lateral surface area of a cube of side is 8 cm.

Light with an energy flux of 20W//cm^2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30cm^2 , the total momentum delivered (for complete absorption) during 30 minutes is: