At what temperatures does the rms speed of (a) H2(molecular hydrogen) and (b) O2 (molecular oxygen) equalthe escape speed from Earth (escape speed=11.2 km/s) ? At whattemperature does the rms speed of (c) H2 and (d)O2 equal the escape speed from the Moon (where thegravitational acceleration at the surface has magnitude0.16g)? Considering the answers to parts (a) and (b), shouldthere be much (e) hydrogen and (f) oxygen high in Earth's upperatmosphere, where the temperature is about 1000 K?The answers are:(a) 1.0 × 104 K;(b) 1.6 × 105 K;(c) 4.4 × 102 K;(d) 7.0 × 103 K;(e) no;(f) yes

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)