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Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 25 seconds to reach top speed, which is 1 revolution per 1.2 s. The astronaut is strapped into a seat 5.5 m from the axis.
a. What is the astronaut's tangential acceleration during the first 25 s?
b. How many g's of acceleration does the astronaut experience when the device is rotating at the top speed? Each 9.80 m/s2 of acceleration is 1 g.
A bucket filled with dirt of mass 22 kg is suspended by a rope that hangs over a pulley of mass 31kg and radius 0.15 m. everything is at first at rest.
The Earth is constantly being bombarded by cosmic rays, which consist mostly of protons. what is the total charge incident on the atmosphere
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Heat Q flows spontaneously from a reservoir at 445 K into a reservoir at 265 K. Because of the spontaneous flow, 2620 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 265 K and a reservoir at 248 K. ..
An artillery shell is fired with an initial velocity of 300 m/s at 47.5° above the horizontal. To clear an avalanche, it explodes on a mountainside 47 s after firing. What is the x and y components of the shell where it explodes, relative to its f..
A physics book slides off a horizontal tabletop with a speed of 2.30 m/s. It strikes the floor in 0.350 s. Find the height of the tabletop above the floor
A small boat is moving at a velocity of 3.35 m/s while it is accelerated by a river current perpendicular to the initial direction of motion. If current acceleration is 0.750 m/s^2, what will the new velocity of the boat be after 33.5 s.
q1. illustrate how the device equipped with an ultrasonic speaker a microphone and a precision timer might be used to
A charged isolated metal sphere of diameter 16.0 cm has a potential of 7000 V relative to V = 0 at infinity. Calculate the energy density in the electric field
An extremely light rod 1.00 m long has a 2.00-kg mass attached to one end and a 3.00-kg mass attached to the other. find the moment of inertia of the system about the fixed axis
A cable is stretched horizontally across the top of two vertical poles 20 m apart. What is the tension in each cable segment
Consider a systen of N non-interacting particles for which the energy of each particle can assume two and only two distinct values: 0 and E (E>0). Find the entropy of the system
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