Aradiator has an emissivity of 0.7 and its exposed area is 1.2 m2. the temperature of the radiator is 850c and the surrounding temperature is 200c. what is the net heat flow rate from the radiator? ( = 5.67x10-8 w/m2k4)

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.

In order to do work, the force vector must be question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion. in the same direction as the acceleration vector.

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