2066 Q. No. 9 d What is the period of revolution of a satellite of mass m that orbits the earth in a circular path of radius
7880 km about 1500 km above the surface of the earth? [4]
Ans: 1.907 hr
2

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.