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As a bacterium swims through water it propels itself with its flagella so as to overcome the frictional drag forces and move at, more or less, constant velocity of 100 micrometers/s for periods of time. If the frictional drag force on a bacterium is 0.1 microNewtons, how much work does the bacterium do in 1 s of sustained velocity?
In emergencies the train can decelerate more rapidly, coming to rest from 80.0 km/h in 8.30 s. What is its emergency deceleration in m/s2
A plastic bag is filled with hydrogen at atmospheric pressure and 20.0 oC. Assume that the mass of the bag is negligible, How large a volume of hydrogen (in m3) is required
A 50.0 g sample of carbon taken from the femur bone of a skeleton is found to havea carbon -14 decay rate of 410 decays/min
A U-shaped tube is connected to a box at one end and open to the air at the other end. What is the gas pressure inside the box
Find the charge-to-mass ratio of an unknown point charge that is repelled strongly enough from a single electron to be suspended motionless against its own weight
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.19 g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0° with the vertical, as sho..
A 10.00 m uniform beam is hinged to a vertical wall and held horizontally by a 5.00 m cable attached to the wall 4.00 m above the hinge, What is the heaviest beam that the cable can support with the given configuration
A bicycle wheel of radius 0.30m is spinning at a rate of 60 revolutions per minuit. What is the period of the wheels motion
Your friend, who is exactly the same age as you, travels at a speed of 0.9990c to a star 25 light-years away. How long does she measure for the time she is away
An AC generator supplies 185 V peak voltage at 110 Hz frequency. How much power is dissipated in a resistor with R = 295 ? resistance connected to the generator?
A laser produces a cylindrical beam of light of wavelength 400nm. The average energy in a 2m length of the beam is 5*10^-8J. What is the average power output of the laser
A plastic bar that is 20 cm long passes a total charge of 5.0 nC distributed evenly along its length, Find the x component of the electric field at point (0.0m,0.10m)
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