A student rated a tasty school lunch containing 700 calories. Due to basal metabolism, the student radiates who it 100 joules per second into the environment. How long would the student have to sit on a couch to radiate away all of the energy from lunch

Why is there friction between objects

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

An observer that stands still as the electron moves by him, will observe