Physics, 17.12.2019 05:31 ladeshak5981
A92kg astronaut and a 1200kg satellite are at rest relative to the space shuttle. the astronaut pushes on the satellite, giving it a speed of 0.14m/s directly away from the shuttle. seven and a half seconds later the astronaut comes into contact with the shuttle. what was the initial distance from the shuttle to the astronaut?
Answers: 1
Physics, 22.06.2019 01:30
In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. thus, the charge can be considered to be distributed uniformly throughout the cloud. for the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. the point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. this breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another nearby cloud. the ionized air will then emit light due to the recombination of the electrons and atoms to form excited molecules that radiate light. in addition, the large current will heat up the air, resulting in its rapid expansion. these two phenomena account for the appearance of lightning and the sound of thunder. take the breakdown electric field of air to be eb=3.00ฤโ106n/c. part a estimate the total charge q on the cloud when the breakdown of the surrounding air is reached. express your answer numerically, to three significant figures, using ฤยต0=8.85ฤโ10รขโ12c2/(nรขโนโฆm2) .
Answers: 2
Physics, 22.06.2019 02:30
Agas contained within a piston-cylinder assembly undergoes three processes in series: process 1๏ 2: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 2๏ 3: constant pressure expansion to 1 liter. process 3๏ 1: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat
Answers: 2
Physics, 22.06.2019 06:00
What will a positive and a negative charge do if they are separated from each other?
Answers: 3
Physics, 22.06.2019 13:10
Most short-period comets do not have randomly oriented orbits because
Answers: 2
A92kg astronaut and a 1200kg satellite are at rest relative to the space shuttle. the astronaut push...
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