Physics

Physics, 12.11.2019 20:31, sriharin58ozhj9m

If we neglect air resistance, what would be the speed of the raindrop when it reaches the ground? assume that the falling raindrop maintains its shape so that no energy is lost to the deformation of the droplet. for comparsion a pistol bullet has a typical muzzle velocity of about 200 m/s.

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Physics, 27.08.2019 18:00, allenJay

Assume that a cloud consists of tiny water droplets suspended (uniformly distributed, and at rest) in air, and consider a raindrop falling through them. what is the acceleration of the raindrop? (assume that when the raindrop hits a water droplet, the droplet’s water gets added to the raindrop. also, assume that the raindrop is spherical at all times.)

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Physics, 10.09.2019 17:10, adot1

Araindrop of mass m0, starting from rest, falls under the influence of gravity. assume that as the raindrop travels through the clouds, it gains mass at a rate proportional to the momentum of the raindrop, dmr = kmrvr, where mr is the in- dt stantaneous mass of the raindrop, vr is the instantaneous velocity of the raindrop, 5 and k is a constant with unit [m−1]. you may neglect air resistance. (a) derive a differential equation for the raindrop’s accelerations dvr in terms of dt k, g, dt and the raindrop’s instantaneous velocity vr . express your answer using some or all of the following variables: k,g for the gravitational acceleration and vr, the raindrop’s instantaneous velocity.

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Biology, 30.09.2019 20:30, martinezizzie

Atypical raindrop is much more massive than a mosquito and falling much faster than a mosquito flies. how does a mos quito survive the impact? recent research has found that the collision of a falling raindrop with a mosquito is a perfectly inelastic collision. that is, the mosquito is swept up by the raindrop and ends up traveling along with the raindrop. once the relative speed between the mosquito and the raindrop is zero, the mosquito is able to detach itself from the drop and fly away.

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Physics, 18.11.2019 19:31, arigamez90

Consider a 4-mg raindrop that falls from a cloud at a height of 2 km. when the raindrop reaches the ground, it won't kill you or even bruise you because its terminal velocity is just 10 m/s. calculate the work done by the air resistance on the raindrop over the course of its fall to the ground. make sure you report your answer with the correct sign. again, assume that the falling raindrop maintains its shape so that no energy is lost to the deformation of the droplet

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