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A listener increases his distance from a sound source by a factor of 3.03. Assuming that the source emits sound uniformly in all directions, what is the change in the sound intensity level in dB?
A 1 115.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 8 200.0 kg truck moving in the same direction at 20.000 m/s. What is the velocity of the truck right after the collision
What is the result of mixing 80g of ice at -20 degrees Celsius, into a 200g of water at 20 degrees Celsius? What fraction of the ice cube melts
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 14.0cm, Find the electric field just inside the paint layer
An emf of 22.0 mV is induced in a 497 turn coil when the current is changing at a rate of 9.0 A/s. What is the magnetic flux through each turn of the coil
A positron emission tomography (PET) scanner examines the gamma rays emitted when positrons and electrons annihilate each other. What is the wavelength of the photons
A particle of rest energy mc^2 is moving with speed v in the positive x direction. The particle decays into two particles, each of rest energy 140 MeV. Find the rest energy of the original particle
What is least amount of work required by an external force
The chemical atomic mass of hydrogen, with the two stable isotopes 1H and 2H (deuterium), is 1.00798. Use m(H1) = 1.007825 u, determine the natural abundance of 2H isotope
An airplane needs to reach a velocity of 487 km/h to take off. On a 2000 m runway, what is the least acceleration necessary for the plane to take flight.
An air puck of mass m1 = 0.30 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes by a hole in the center of the table, and a mass m2 = 1.20 kg is att..
Charge A and Charge B are 5.00m apart, A is +3.00 C and charge B is +7.00C, How far from charge A is charge C
An electric toaster operating on 110.8 volts draws a current of 5 amperes. What is the resistance of the toaster
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