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A 45.0 g ball of copper has a net charge of 1.75 µC. What fraction of the copper's electrons have been removed?
A 210 g piece of ice at 0°C is placed in 410 g of water at 22°C. The system is in a container of negligible heat capacity and is insulated from its surroundings. How much of the ice melts
A steel cable has a cross-sectional area 3.44 × 10-3 m2 and is kept under a tension of 3.33 × 104 N. At what speed does a transverse wave move along the cable
An electron of mass, m, collides with an atom of mass M. The atom is initially at rest, What is the minimum speed of the electron in order to excite the atom
Scientist calls a theory that unites many ideas in a simple way "beautiful." Are unity and simplicity among the criteria of beauty outside of science? Help support the answer.
Use the Rydberg equation to calculate the wavelength in nm of the light emitted, What is the color of the light emitted
Changes in wind and tide made average speed on return trip 3 mph slower than the speed on the way out. If the total time of the trip took 9 hours find speed of both the going and the return trip.
The active element of a certain laser is an ordinary glass rod 19.5 cm long and 1.37 cm in diameter. Calculate its increase in volume
A ball is thrown on a projectile path with an initial vertical velocity of 30 m/s. find the initial horizontal velocity
A 8.75-\mu {\rm C} point charge is glued down on a horizontalfrictionless table. What would the tension be if both charges were negative
Superman meets an asteroid in outer space and hurls it at 90m/s. The asteroid is five hundred times more massive than Superman is. In the strip, Superman is seen at rest after throw. Taking physics into account, what would be his recoil speed.
A ball is tossed from an upper story window of a building. Compute the height from which the ball is thrown.
A train is travelling up a 5 degree incline at a speed of 2.2 m/s while the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did last car travel before mom..
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