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astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge take 20.0 seconds to reach top speed, which is 1 revolution per 1.20 seconds. the astronaut is strapped into a seat 5.50 m from the axis.
(a) what is the astronauts tangential acceleration during the first 20.0 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/s^2 of acceleration is 1g.
You have a lens whose focal length is 12.7 cm. You place an object on the axis of the lens at a distance of 6.25 cm from it. How far is the object\'s image from the lens
A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice-water mixture at the other.
two forces are applied to a stump by two tractors. one is a 150 n force to the east. the other is 100 n in a direction
An 800 g ball moves in a vertical circle on a 1.07-m-long string. If the speed at the top is 5-m/s, after that the speed at the bottom would be 8.18 m/s.
q1. a roller-coaster car speeds down a hill past point a where r1 10.0 m and then rolls up a hill past point b where
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. calculate the rate of interstellar extinction in the direction of the star
find out the z-component of the block's momentum after the kick.
What is the speed of the electron when it strikes the target? How far does it fall under the influence of gravity during its flight?
An artificial satellite circling the Earth completes each orbit in 133 minutes. Find the altitude of the satellite
A rectangular block of wood, 10 cm*15 cm*40 cm, has a specific gravity of 0.6. What fraction of the block is submerged
A 6.0 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.7 m/s2, find the force exerted by the rope on the bucket
Calculate : a) the pressure at this depth b) the change in volume of the sphere do to the pressure GIVEN : density of copper = 8.9*10^3 kg/m^3 youngs modulus = 11*10^10 N/m^2
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