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A 4.9 m diameter merry-go-round is rotating freely with an angular velocity of 0.780 rad/s. Its total moment of inertia is 1550kg*m2. Four people standing on the ground, each of mass63.6 kg, abruptly step onto the edge of the merry-go-round. Describe is the angular velocity of the merry-go-round now?
A tube is open only at one end. A certain harmonic produced by the tube has a frequency of 470 Hz. What is the length of the tube
A uniform disk with radius 0.370m and mass 30.5kg rotates in a horizontal plane on a frictionless vertical axle that passes through the center of the disk. What is the resultant linear acceleration of a point on the rim of the disk
A moving particle encounters an external electric field that decreases its kinetic energy from 10270 eV to 7400 eVas the particle moves from position A to positionB. The electric potential at A is -52.0 V, and the electric potential at Bis +27.7 V..
The capacitance of an empty capacitor is 1.2µF. The capacitor is connected to a 12-V battery and charged up. What is the dielectric constant for the material
the base of a record player is a disk that has a mass of 2 kg and a diameter of 34 cm. a child spins it so it rotates
Two blocks with masses M1= 4.9 and M2 = 3.5 are connected with a massless string over two massless and frictionless pulleys. What is the acceleration of mass M2
Find the maximum temperature in a Carnot cycle operating in a room-temperature (23 degrees C) environment if its Carnot efficiency is 0.2. Express your answer using one significant figure. TH = ? K
A helicopter is moving horizontally to the right at a constantvelocity. The weight of the copter is 53800 newtons. what is the magnitude of the lift force
an empty parallel plate capacitor is connected between the terminals of a 18.1-v battery and charges up. the capacitor
An electron is accelerated from rest through a potential difference that has a magnitude of 2.20 × 107 V. The mass of the electron is 9.11 × 10-31 kg, What is the relativistic kinetic energy (in joules) of the electron
A baseball player stealing second base runs at 7.8 m/s. If he slides the last 3.6 m, slowing to a stop at the base, what's the coefficient of kinetic friction between player and ground
A house has well-insulated walls. It contains a volume of 75 m3 of air at 295 K. (a) Consider heating it at constant pressure. Calculate the energy required to increase the temperature of this diatomic ideal gas by 2°C. kJ (b) If this energy could be..
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