Question 19
Manned missions in space must carefully consider the way they return to the surface of Earth. Discuss the issues involved with re-entry with safe return of the human occupants to the surface. (5 marks)
Question 21
It's a diagram to do with torque and motors, just know forces when a loop is in an external magnetic field, maximum torque and reasons why.
(a) Describe the force on one side - 1 Mark
(b) Maximum Toque - 1 Mark
(c) Describe how torque acting on the coil will change as motor is switched on, begins to rotate and finally reaches the point where it is completing 5.0 revolutions per second.