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Some bacteria are propelled by biological motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.60 10-8 m, and a tangential speed at the rim of 2.32 10-5 m/s.
(a) What is the angular speed (the magnitude of the angular velocity) of this bacterial motor? rad/s
(b) How long does it take the motor to make one revolution? s
A satellite circles the earth in an orbit whose radius is 1.83 times the earth's radius. What is the period of the satellite
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The radius of Earth is about 6.38 multiplied by 10^3 km. A 7.02 multiplied by 10^3 N spacecraft travels away from Earth. What is the weight of spacecraft at the following distances from Earth's surface: 6.38 times 10^3 km and 1.4 times 10^4 km.
A tennis player tosses a tennis ball straight up and then catches it after 1.86s at the same height as the point of release. What is the acceleration of the ball while it is in flight
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A projectile is shot at an angle of 60 degrees to the horizontal near the surface of the earth but in the absence of air resistance. The initial launch speed of the projectile is what
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