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A playground merry-go-round of radius R = 2.00 m has a moment of inertia I = 245 kg m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. Facing the axle, a 27.0 kg child hops onto the merry-go-round and manages to sit down on its edge. What is the new angular speed of the merry-go-round?
The frequency of a pendulum is 39 percent less when onthe surface of Mars than when on the earth's surface. Use this factto calculate the acceleration of gravity on Mars.
Two speakers emit sound waves with frequency of 418 Hz. They are driven by the same oscillator so that they are in phase with each other. How far apart are the antinodes in that standing wave
A car battery with 12 V and negligible internal resistance (r=0) is connected three identicle resistors with R=20. find the current and power of each resistor consumes when the switch is open
A particle having charge q = +2.50 µC andmass m = 0.0100 kg is connected to a string that isL = 1.20 m long and is tiedto the pivot point P. The particle, string, and pivotpoint all lie on a frictionless horizontal table.
A 54.5 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 363 g of water, initially at 21.2°C. What is the final temperature of the water
A spring of stiffness 25 kN m-1 is compressed by an initial load of 5 kN, gradually applied, What is the total work done on the spring
Two long parallel wires are separated by 4.0mm. The current flowing in one of the wires is twice that in the other wire. If the magnitude of the force on a2.0-m length of one of the wires is7.2µN, what are the values of the two currents? (Enter your ..
A helium-neon laser of = 633 illuminates a diffraction grating. The distance between the two m= 1 bright fringes is 36.0 cm on a screen 2.40 m behind the grating. What is the spacing between slits of the grating
The concentration was reported as 10% CO2 at a temperature of 30oC and a pressure of 1.2 atm. The flow rate of flue gas is 18,000 m3/min. Determine the Partial pressure of CO2 in atm.
Two 2.7cm -diameter disks face each other, 2.7mm apart. They are charged to ±14nC. What is the electric field strength between the disks
Two 0.70g spheres are charged equally and placed 2.4 cm apart. what is the charge on each sphere
An iron ball is swung in a vertical circle at the end of a 0.7 m string. How slowly, in ft/s, can the ball go during its top position without having the string go slack?
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