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A person, sitting on a stool rotating at a rate of 21 rpm, holds masses in each hand. When their arms are outstretched , the total rotational inertia of the system is 3.7 kg·m2. The person pulls their arms close to their body, reducing the total rotational inertia to 1.7 kg·m2. If there are no external torques, what is the new angular velocity of the system in rad/s?
A gold nucleus contains 197 nucleons packed tightly against each other. A single nucleon (proton or neutron) has a radius of about 1.310-15 m. Calculate the approximate radius of the gold nucleus. (Hint: Remember that the volume of a sphere is (4/..
A 36.0 µF capacitor is connected to a 49.0 omegacap.gif resistor and a generator whose rms output is 30.0 V at 60.0 Hz. find The rms voltage drop across the resistor.
In 6.00 days the number of radioactive nuclei decreases to one-eight the number present initially. What is the half-life (in days) of the material
An air-filled capacitor consists of two parallel plates, each with an area of 7.06 cm2, separated by a distance of 1.28 mm, Find the capacitance
If the electric field in an EM wave has a peak value of 0.45X10^-4 V/m, what is the peak value of the magnetic field strength
q1. a bucket filled with water has a mass of 20 kg and is attached to a rope which in turn is wound around a 0.050-m
A human-sized version of the popular "hamster wheel" is shaped like a cylindrical shell and has a radius of 2.25 m. A person running on the wheel applies a horizontal force of 148 N to the bottom of the wheel. What torque does he supply
An air-core solenoid is attached to a 6 V battery via a switch. The switch is closed, what is the resistance and inductance of the coil
a 1.00 x 10^4 kg railroad car is rolling at 6 meters per sec. What is the cars speed just after gravel is loaded
A copper pot with a mass of 0.485kg contains 0.175kg of water, and both are at a temperature of 20.0?C. Find the final temperature of the system
Steam is expanded from 12.5 MPa and 900 degrees Celsius to 0.30 MPa, 400 degrees Celsius in an adiabatic turbine. Determine the power output by this turbine
q1. gamma-ray busters are objects in the universe that emit pulses of gamma rays with high energies. the frequency of
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