Consider a conducting sphere with a radius as of 1 m. what is the rcs of this sphere at an rf of 10 ghz? give the answer in units of both square meters and dbsm. (assume the sphere is "much larger than" the wavelength.) what must be the side length at of a trihedral so that it has the same rcs at 10 ghz? what is the ratio of the size of the sphere compared with that of the trihedral, as/at ?

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2