for the question asking to assess the validity of the experiment to measure the electrical resistance at -100 degrees celcius, how did you guys go about answering this?
uhh Yep! 1 mark for stating that blue has higher frequency, thus energy.
1 mark for stating that the red light had higher intensity, hence photocurrent
uhh question 16 can only be B
A is wrong; satellite undergoes centripetal acceleration in orbit
C is wrong; there is NO thrust when a satellite is in orbit. The only force acting on it is the gravitational force (same as centripetal)
D is wrong; centripetal force IS the gravitational force