1. From his original orbit at the altitude of 4.010 6 m, how much work must his rocket-pack do to allow him to escape from the earth's gravity?

2. Two equally charged particles, held 3.210 -3 m apart, are released from rest. The initial acceleration of the first particle is 7.0 m/s 2 and that of the second is 9.0 m/s 2 . If the mass of the first particle is 6.310 -7 kg, what are (a) the mass of the second particle, and (b) the amount of charge on each particle?

3. Light that is polarized in 1 direction is shone at a filters set at 30 to the light`s original direction of polarization. a. What is the amplitude of the transmitted electric field relative to the original field? b. What is the intensity of light that gets through?