Physics, 30.11.2019 05:31 chanahvanya
A1200 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. the car bounces with maximum amplitude when its speed is 15 km/h. the car now stops, and the four people get out. by how much does the car body rise on its suspension owing to this decrease in weight?
Answers: 1
Physics, 21.06.2019 19:30
Describe the path of a ray that approaches a mirror parallel to the principal axis.
Answers: 2
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=3.00ă—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, 22.06.2019 04:10
An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?
Answers: 2
Physics, 22.06.2019 04:40
How is the gravitational force related to the distance between two objects?
Answers: 1
A1200 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations...
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