In a research facility, a person lies on a horizontal platform which floats on a film of air. when the person's heart beats, it pushes a mass m of blood into the aorta with speed v, and the body and platform move in the opposite direction with speed v. assume that the blood's speed is 52.0 cm/s. the mass of the person + platform is 54.0 kg. the platform moves 5.75 x ^10β5 m in 0.160 s after one heartbeat. calculate the mass (in g) of blood that leaves the heart. assume that the mass of blood is negligible compared with the total mass of the person, and the person + platform is initially at rest. (also assume that the changes in velocity are instantaneous.) g
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Physics, 22.06.2019 01:30
Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33
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Physics, 22.06.2019 03:00
According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?
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Physics, 22.06.2019 13:00
At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius Οa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature Οr of its path, both as observed by the nonrotating skydiver.
Answers: 3
Physics, 22.06.2019 13:30
If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?
Answers: 2
In a research facility, a person lies on a horizontal platform which floats on a film of air. when t...
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