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Equal masses of ice at an unknown temperature are added to water.Temperature of water is 20 degrees C. Ice and water are mixedtogether and reach thermal equilibrium at -10 degrees C. What is the initial temperature of ice?
A flight attendant pulls her 63-N flight bag a distance of 277-m along a level airport floor at a constant velocity. The force she exerts is 35N at an angle of 57° above the horizontal. Determine the work completed by the force of friction on flig..
A worker pushed a 27kg block 9.2 m along a level floor atconstant speed with a force directed 32o below thehorizontal. find the increase in thermal energy of theblock-floor system
a thin film of alcohol (n=1.36) lies on a flat glass plate (n=1.54). when monochromatic light, what is the thickness of the film
an electron is observed traveling at a speed of 38.9middot106 ms parallel to an electric field of magnitude 12800 nc.
A lead bullet (? = 11.3 X 103 kg/m3) is placed in a pool of mercury (? = 13.6 X 103 kg/m3). What fractional part of the volume of the bullet is submerged
An air-track glider attached to a spring oscillates with a period of 1.50 seconds. At t = 0, the glider is 4.40 cm left of the equilibrium position and moving to the right at 31.9 cm/s. What is the phase constant?
The motion of a 25.0 kg mass on the end of a string is uniform circular motion. The magnitude of the tangential velocity of the mass is 5.0 m/s, Calculate the angular momentum of the mass
In 1911, Ernest Rutherford discovered the nucleus of the atom by observing the scattering of helium nuclei from gold nuclei. how close will the helium atom come to the gold nucleus
What is the maximum speed with which a 1200 kg car can round a turn of radius 60.0m on a flat road if the coefficient of friction between tires and road is 0.65.
A uranium nucleus with a charge of 92e can spontaneously decay into a thorium nucleus of charge 90e and an alpha particle of charge 2e. what is the initial potential energy
A pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. We receive a radio pulse for each rotation of the star. The period T of rotation is found by measuring the time between pulses. Suppose a pul..
Monochromatic light of wavelength 683 nm passes through a fast shutter that opens for 10^(-10) s. The light the emerges will no longer be monochromatic. What will be the spread of the wavelengths?
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