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

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit