Physics, 28.01.2021 04:00, christopherschool04
A girl running around a circular track of radius 200 m completes one
revolution in 10 minutes. What is her average velocity in one full
revolution
Answers: 1
Physics, 22.06.2019 01:30, kadinmorgan
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=3.00ă—106n/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 ďµ0=8.85ă—10â’12c2/(nâ‹…m2) .
Answers: 2
Physics, 23.06.2019 10:30, jumeljean123oythxy
Abig box of sausages (30 kg) are lifted from the ground to the top shelf of the freezer. if the box is lifted at a constant speed, a distance of 1.75 m, what work is done by gravity?
Answers: 1
A girl running around a circular track of radius 200 m completes one
revolution in 10 minutes. What...
Health, 16.01.2022 15:20
Chemistry, 16.01.2022 15:20
Mathematics, 16.01.2022 15:20
Biology, 16.01.2022 15:20
Physics, 16.01.2022 15:20