At a distance of one astronomical unit (au) from the sun, the distance at which the earth’s orbit is located, the radiative heat flux from the sun is approximately 1350 w/m2 . consider a thin copper plate at this distance, one side of which faces deep space. the side facing the sun is highly polished with a solar absorptivity of 0.16 and an emissivity of 0.03, whereas the side facing deep space is oxidized with an emissivity of 0.8. find the temperature of the plate.

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

True or false graphs must include scales that increase by the same amount