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z Medical Questions

Questions:                                                                               TimeLeft:      Posted:
Physics
A potter's wheel with a moment of inertia of 8.0 kg m^2 has 5.0 N m applied to it. It starts from rest. 10.0 seconds later it has gained what k more... expired Oct 22nd
Consider two uniform solid spheres where one has twice the mass and twice the diameter of the other. The ratio of the larger moment of inertia to that more... expired Oct 22nd
A bicycle is moving 4.0 m/s. What is the angular speed of a wheel if its radius is 30.0 cm?

(a) 4.8 rad/s
(b) 7.6 rad/s more...
expired Oct 22nd
A wheel of diameter 0.70 m rolls without slipping. A point at the top of the wheel moves with a tangential speed of 2.0 m/s. (a) At what speed is the more... expired Oct 22nd
Europa, a moon of Jupiter, has an orbital diameter of 1.34 x 10^9 m, and a period of 3.55 days. What is the mass of Jupiter? more... expired Oct 22nd
In space a 4.0 kg metal ball moving 30.0 m/s has a head-on collision with a stationary 1.0 kg ball. After their perfectly elastic collision, what are more... expired Oct 22nd
A girl hits a stationary 200.0 gram ball and it leaves the racket at 40.0 m/s. If time lapse photography shows that the ball was in contact with the r more... expired Oct 22nd
Water flows over a waterfall 20.0 m high, at the rate of 4.0 x 10 ^4 kg/s. If the water powers an electric generator with a 40% efficiency, how many w more... expired Oct 22nd
In space there is nothing for a rocket to "push against," so how does it accelerate (answer first in terms of momentum and then in terms of more... expired Oct 22nd
If the net force on an object is zero, does the net torque on the object have to be zero? Why? more... expired Oct 22nd
Neglecting friction, find the acceleration (direction too) of the system for m1 = 0.25 kg, m2 = 0.50 kg, and m3 = 0.25 kg. more... expired Oct 21st
Water flows over a section of Niagara Falls at the rate of 1.0 106 kg/s and falls 48.0 m. How much power is generated by the falling water in Watts? more... expired Oct 20th
When an automobile moves with constant velocity, the power developed is used to overcome the frictional forces exerted by air and road. If the power d more... expired Oct 20th
A 95.0 N grocery cart is pushed 14.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are negl more... expired Oct 20th
An 80.0 N box of clothes is pulled 17.0 m up a 30.0° ramp by a force of 115 N that points along the ramp. If the coefficient of kinetic friction b more... expired Oct 20th
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