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A day-care worker pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a spinning rate of 20.4 rpm in 11.0 s. Assume the merry-go-round is a disk of radius 2.34 m and has a mass of 700 kg, and two children (each with a mass of 26.8 kg) sit opposite each other on the edge. Calculate the torque required to produce the acceleration, neglecting frictional torque. what force is required?
Two resistors A and B are connected in series to a 9.0 V battery; the voltage across resistor A is 6.0 V. What are the resistances of A and B
Using Ampère's law, calculate the magnetic field inside and outside of a toroidal coil with a radius of 25 cm
An isolated conducting sphere has a 13 cm radius. One wire carries a current of 1.0000048 A into it while another wire carries a current of 1 A out of it. How long in seconds would it take for the sphere to enhance in potential by 820 V.
A 1000N force inclined at 40 degrees with the horizontal is applied to move a block mass 150kg. compute the normal force acting on block
A simple pendulum uses a steel wire as the "string." The length of this wire is 1.5 m at room temperature. What is the change in the period of the pendulum
What phase difference between two otherwise identical travelling waves, moving in the similar direction along a stretched string.
A chimp jumps up from a trampoline and lands on the ground, 1.2 meters below. the total time taken was .095 secons. what is the maximum height above the ground
Assuming the diver has inhaled a negligible amount of air from the tank, what is the temperature of the ocean water.
The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between mass 1 and teh ramp is 0.25. Evaluate the change in kinetic energy of the 50 kg block as it moves from a to b, a distance of 20 m
Two capacitors of capacitance 6.00 microFarad and 8 microfarad are connected in parallel, What is the potential difference across the 6.00-uF capacitor
A mass of 0.5 kg is suspended from a spring, which stretches by 8 cm. The support from which the spring is suspended is set into sinusoidal motion. At what frequehcy would you expect resonant behavior?
In an experiment on the transport of nutrients in a plant's root structure, two radioactive nuclides X and Y are used. What is the half-life of isotope X
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