A girl of mass 40kg climbs a rope 8m long at a constant speed in 15s . WhT power does she expand against gravitational forces during the climbs ? I saw that the answer is 213.33
But the Dr. said it’s -213.33 according to ( final h- initial h)
So ... I don’t know what is the right answer
Plz help

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?