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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?
A 12.0-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 12.2 m/s, determine the rotational kinetic energy about its center of gravity
A rifle with a barrel length of 56 fires an 8 bullet with a horizontal speed of 350. The bullet strikes a block of wood and penetrates to a depth of 14. (a) What resistive force (assumed to be constant) does the wood exert on the bullet? (b) How long..
an electron and a proton are initially very far apart effectively an infinite distance apart. they are then brought
A body is thrown straight up from ground level with an initial velocity of 100 m/s. How high did it go before falling back to earth
A block with mass mA = 11.0kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 6.0kg which hangs vertically
in a friendly game of handball you hit the ball essentially at ground level and send it toward the wall with a speed of
the electric field has a constant value of 2.7 x 105 vm and is directed downward. the field is the same everywhere. the
A gravity station at a location of 0m is located in the center of an erosional basin. The floor of the basin has virtually no relief. An escaprment of a plateau is located at a distance of 3000m from the gravity station. The surface of the plateau..
A cart is attached to a hanging mass by a string that passes over a pulley. Write an equation for the work done by friction when the cart is moving up the track at constant speed
An 8.70kg block slides with an initial speed of 1.66m/s up a ramp inclined at an angle of 27.4 degrees to the horizontal. The coefficient of kinetic friction among the block and the ramp is 0.3. Use energy conservation to discover the distance the bl..
Two Carts have a perfectly inelastic collision. Cart A has mass 34.8 kg and velocity 5.08 m/s directed north immediately before the collision. What is the speed of the two carts
The muon is an unstable particle that spontaneously decays into an electron and two neutrinos. If the number of muons at t 0 is N0, the number at time t is given by N N0et/, where is the mean lifetime, equal to 2.2 s.
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