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The flywheel of a steam engine runs with a constantangular speed of 156 rev/min. When steam is shut off, the friction of the bearings and of the airbrings the wheel to rest in 2.20 h.
(a) What is the constant angular acceleration of the wheel, inrev/min2 ?
(b) How many rotations will the wheel make before coming torest?
(c) What is the tangential linear acceleration of a point 52.4 cmfrom the axis of rotation when the flywheel is turning at 72.5rev/min
(d) What is the magnitude of the total linear acceleration of thepoint in (c)?
A pinecone falls straight down from a pine tree growing on a 20 degree slope. What are the components of the pinecone's impact velocity parallel and perpendicular to the ground
When an objectis placed 132cm from diverging thin lens, itsimage is found to be 66 cm from the lens. find Where is the image of the object now
In the figure below a crowbar is used to lift a weight. If a down ward force of 228 N is applied to the end of the bar, how much weight does the other end bear? The crowbar itself has negligible weight. (Let r1 = 29.0 cm and r2 = 4.70 cm.)
An access door in a ceiling is 0.91m square, has a mass of 11kg, what are the magnitudes of the forces on the catch and the hinge from the door
An object is located 15 cm in front of (to the left of) a converging lens with a focal length of 10 cm. To the right of the converging lens, What is the location of the final image
200 ml of coffee ( density = 1000kg/m^3 , specific heat 4186j/kg C ) is insulated in a mug at a temp of 85C. If 25ml of cream ( density of 1500 kg/ m^3 , specific heat 4500j / kg C at 10 C is added what will be the new temperature of the system?
A photon having E = 25.7 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon, At which angle will the electron scatter
A 2.75 m long board is used to slide a compressor a vertical distance of 75 cm. What is the Mechanical Advantage of the ramp made by the board
A girl rides an escalator that moves her upward at a constant speed. As the girl rises, how do her gravitational energy and kinetic energy change.
an electric field is constant at every point on a square surface that is 0.80 m on a side. this field has a magnitude
A subway train starts from rest at a station and accelerates at a rate of 1.60 m/s squared for 14 seconds. Find the total distance covered
A 15.9g bullet traveling horizontally at 871m/spasses through a tank containing 14.5kg of water and emerges with a speed of 537m/s
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