Young athlete has a mass of 42 kg one day there is no wind shear and hundred metre race in 14.2 second a sketch graph not in sketch showing her speed during the race is

icalculate the acceleration of the athlete during the first 3 seconds of the race
ii the escalating for of the athlete during the first 3 seconds of the race
iii the with whicj she crosses the finish line.

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?