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A sprinkler rotates with a constant angular velocity, see figure. The flow rate is Q and each arm has an outlet area A.
(a) Determine the torque T necessary to maintain the sprinkler at an angular velocity ω and determine the breaking power. For which ω is it max?
(b) If the sprinkler is torque free, what is the angular velocity?
In proton-beam therapy, a high-energy beam of protons are fired at a tumor. Find the total charge of protons that must be fired at tumor
Through a time interval of exactly one period of vibration of a tuning fork, the emitted sound travels a distance: Equal to the length of the tuning fork, Equal to twice the length of the tuning fork
Two small spheres hang in equilibrium at the bottom ends of threads, 40.0 cm long, that have their top ends tied to the same fixed point. Find the distance between the centers of the spheres
At the instant a traffic light turns green, a van that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. Find the speed of the van when it passes the truck
A 0.07-kg lead bullet traveling 296 m/s strikes an armor plate and comes to a stop. If all of the bullet's energy is converted to heat that it alone absorbs
Estimate the size of the friction force on a baseball player sliding into second base. Assume a mass of 84 and uk = 0.42
a mosquito collides head-on with a car traveling at 60 mph. is the force of the mosquito on the car larger than smaller
The ball rolls off the edge and falls a vertical distance of 2.00 m before hitting the floor. Illustrate what is the angular displacement of the ball while the ball is in the air?
While skiing in Jackson, Wyoming, your friend Ben (of mass 84.3 kg) started his descent down the bunny run, 27.7 m above the bottom of the run. If he started at rest and converted all of his gravitational potential energy into kinetic energy, what is..
a 106 kg object moves in a horizontal straight line with an initial speed of 58 ms. if it is stopped along that line
A car with a total mass of 1.57 103 kg has wheels of radius 32.5 cm and moment of inertia 0.875 kg · m2. Find the car's rotational energy when the car is moving at a speed of 21.0 m/s
Two charged particles are located on the x axis. The first is a charge +Q at x = -a. The second is an unknown charge located at x = +3a, What are the two possible values of the unknown charge
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