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A woman stands at the center of a platform. The woman and the platform rotate with an angular speed of 5.20 rad/s. Friction is negligible. Her arms are outstretched, and she is holding a dumbbell in each hand. In this position the total moment of inertia of the rotating system (platform, woman, and dumbbells) is 5.40 kg·m2. By pulling in her arms, she reduces the moment of inertia to 4.40 kg·m2. Find her new angular speed.
A galvanometer has a coil resistance of 29.0 ?. It is to be made into a voltmeter with a full-scale deflection equal to 100.0 V, what size resistor should be placed in series with the galvanometer
Four moles of an ideal gas undergo a reversible isothermal expansion from volume V1 to volume V2 = 5V1 at temperature T = 400K. Find the entropy change of the gas
6 kg of a substance undergoes a process from 1.00 MPa, 0.50 m^3 to 500 kPa, Find the work in kJ for the path given below and Find the heat transfer for the process in Btu. PV^1.6 = constant
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
The accumulator is to supply 10,000 in3 of oil to the piston at a maximum pressure of 400 psig and a minimum pressure of 300 psig. Find the size of the accumulator
In each of the four scenarios, a large bat lets out a short burst of ultrasonic sound, which the smaller bat hears a moment later. what return frequency will the large bat detect
A rocket moves upward, starting from rest with an acceleration of 32.0 m/s2 for 4.32 s. How high does it rise above the ground
Two loudspeakers are placed 3-m apart. They emit 498 Hz sounds, in phase. A microphone is placed 3.2m distant from a point midway between the two speakers, where an intensity highest is recorded.
A hovercraft of mass 69.0 kg can move on a horizontal surface, the x-y plane. How much work is done on the hovercraft by the force during this time
Find the Band Structure and Band Occupancy
A jet flying faster than the speed of sound creates a shock cone of high pressure air. What will be the angle of the shock cone
As a small aircraft approaches a landing strip, it is flying along horizontally at constant (low) altitude, What is the weight of the plane? Air density = 1.29 kg m-3
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