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A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 9.8s. Assume the merry-go-round is a uniform disk of radius 2.4m and has a mass of 690kg , and two children (each with a mass of 24kg ) sit opposite each other on the edge.
Calculate the torque required to produce the acceleration, neglecting frictional torque.
What force is required at the edge?
A 460-Hz tuning fork causes resonance in the tube depicted in the figure below when the length L of the air column above the water is 18.3 and 55.8 cm, Find the speed of sound in air
On a frictionless, horizontal air track, the glider oscillates at the end of an ideal spring of force constant 2.52N/cm. The graph in the acceleration of the glider as a function of time. Find the mass of the glider.
If the current price of July WTI futures is $87 and the strike price is $86, illustrate what is the intrinsic value of this call? Illustrate what is the time value?
A helium-neon laser intended for instructional use operates 7.5 mW. Find out the maximum value of the electric field at a point where the cross sectional area of beam is 10 mm.
A proton collides elastically with a stationary deuteron. If the proton is deflected by 37 degrees, what fraction of its kineti energy does it transfer to the deuteron.
A car is traveling along a straight road at a velocity of +34.0 m/s when its engine cuts out. For the next ten seconds, the car slows down, and its average acceleration is a1.
Find the acceleration of an elerton in this field. What is its speed after 50ms.
A cube of side 8.50cm is placed in a uniform field E=7.50×103 N/C with edges parallel to the field lines, What is the net flux through the cube, What is the flux through the right face
two tuning forks oscillating coherently and in phase at 1200Hz are separated by 0.35m, Calculate the angles of minimum intensity
How far away is the Milky Way from our nearest neighbour, Andromeda Galaxy, if Andromeda contains roughly the similar number of stars and attracts the Milky Way with a gravitational force of 2.4 x 10^30 N.
A 420g oscillator has a speed of 128.5cm/s when its displacement is 3.30cm and 59.5cm/s when its displacement is 5.40cm .what is the oscillator's maximum speed
A 1100 car traveling at a speed of 40 skids to a halt on wet concrete where = 0.50. How long are the skid marks.
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