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A spaceship is measured to be 158 m long while at rest relative to the observer. If this spaceship now flies by the observer with a speed 0.973 times the speed of light, what length does the observer measure?
A panicular spring has a spring constant of 86 N/m and a mass of 0.548 kg at its end. When the spring is driven in a viscous medium, the resonant motion occurs at an angular frequency of 12.2 rad/s.
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
If an electron-positron pair with a total kinetic energy of 3.50 MeV is produced, find the frequency of the photon that produced the pair
The molecule has a rotational kinetic energy that is of the translational kinetic energy of its center of mass. What then is molecule's angular speed about the center of mass.
A well insulated rigid vessel also contains 3 kg of saturated liquid water at 40 oC. Determine the final temperature in the vessel after the resistance has been operating for 20 minutes
A series LRC circuit consists of a 12.0-mH inductor, a 15.0-µF capacitor, a resistor, and a 110-V (rms) ac voltage source. what is its impedance at a frequency twice the resonance frequency
Find the net downward force on the tank's flat bottom, of area 2.25m2 , exerted by the water and air inside the tank and the air outside the tank
assume that you are swimming in a river while a friend watches from the shore. In calm water, you swim at a speed of 1.25 rm m/s . The river has a current that runs at a speed of 1.00 rm m/s.
3.00×104 of 300 C steam at a pressure of 20.0 is cooled until it condenses. What is the volume of the liquid water
The Beretta Model 92S (the standard-issue U.S. army pistol) has a barrel 127 long. What is the acceleration of the bullet while it is in the barrel
What is the partial pressure of oxygen in humidified air (RH= 100%) at body temp, if the barometric pressure is 750 torr
A bat is pursuing an insect and using echolocation of 60-kHz sound waves to track the insect. find the difference in the two echo times the bat measures
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