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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 13.1 rpm in 10.7 s. Assume the merry-go-round is a uniform disk of radius 2.40 m and has a mass of 875 kg, and two children (each with a mass of 26.6 kg) sit opposite each other on the edge.
A/ Calculate the torque required to produce the acceleration, neglecting frictional torque.
B/ What force is required at the edge?
A compound microscope has an objective lens of focal length 10.50 with an eyepiece of focal length 14.80, and it produces its final image at infinity. The object to be viewed is placed 2.00 beyond the focal point of objective lens.
A copper wire has a 25-m ohm resistance at 20 degrees C. When the wire is carrying a current, What is the change in the wire's resistance
Calculate the number of electrons in a steel (iron) pinhead. The pinhead may be assumed to be spherical with diameter 2 mm
the maxium compresional stress that a bone can with stand is 1.6 * 10^8 N/m^2 before it breaks.What is the maxium compresional force that can be applied to the femur bone
How to find out potential energy
An ideal gas occupies 0.14 m3 at an absolute pressure of 1.2×105 Pa and temperature 280 K, How many moles of gas are there
The proton is replaced with He2+ ion now at a distance of 3 cm from the bead. What is the magnitude of the force experienced by the helium ion
The blue ball moves at an angle of -35° and a velocity of 2.1 meters/second. What is the final y-momentum of the system?
On a distant planet, golf is just as popular as it is on earth. On the distant planet, what is the maximum height of the ball
In an L-R-C series circuit, the rms voltage across the resistor is 28.0V , across the capacitor it is 91.0V, What is the rms voltage of the source
Use Gauss law to compute amount of charge
How would you determine the density of an irregularly shaped rock, Is buoyant force a conservative force
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