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A solid cylinder is rolling on a surface. What fraction of its total kinetic energy is in the form of rotational kinetic energy about the center of mass?
A pulsar is an extremely dense neutron star which is a highly magnetized. As it rotates it emits a beam of electromagnetic radiation which can sweep across the earth at very regular intervals. by what amount would the pulsar radius have had to shri..
A uniform magnetic field is perpendicular to the plane of acircular loop of diameter 8.6 cm formed from wire of diameter 1.9mm and resistivity of 2.12 x 10-8Ω·m. Atwhat rate must the magnitude of the magnetic field change to inducea 14 A current in..
what mass of water at 27.0 degc must be allowed to come to thermal equilibrium with a 1.59-kg cube of aluminum
When one person was talking in a small room, sound intensity level was 60dB everywhere within the room. Then, there were 14 people talking in similar manner at the same time in the room, what was the resulting sound intensity level.
Light of two wavelengths, ? = 520 nm and ?' = 550 nm falls normally on a diffraction grating having 3500 lines/cm. Determine the distance between the two spectrum lines in the first order. Repeat for the second order
A ceiling fan is turned on and reaches an angular speed of 120 rev/ min in 20s. through how many revolutions did the fan turn
In the figure below, two skaters, each of mass 35 kg, approach each other along parallel paths separated by 2.2 m. They have opposite velocities of 1.9 m/s each. What is the angular speed of the skaters
The position of an object as a function of time is (3.2t + 1.8t^2)i + (1.7t + 2.4t^2), Find the magnitude and direction of the object
A person can change the volume of his body by taking air into his lungs. The amount of change can be determined by weighing the person under water. Find the change in body volume
it takes the elevator in a skyscraper 4.0 to reach its cruising speed of 10 . a 60 passenger gets aboard on the ground
You need to use your cell phone, which broadcasts an 720 MHz signal, but you're behind two massive,radio-wave-absorbing buildings that have only a 13 m space between them. What is the angular width ofthe electromagnetic wave after it emerges from bet..
A baseball has a mass of 0.15 kg and radius 3.7 cm. In a baseball game, determine the rotational and translational kinetic energies of the ball
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