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Two railroad cars, each of mass 6400 kgare traveling 94 km/h toward each other.They collide head-on and come to rest. How much thermal energy is produced in this collision?
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An outfielder throws a 0.150 kg baseball at a speed of 54.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion
a ball is thrown horizontally from a high cliff with a velocity of 5 ms. ignoring the slowing of the ball due to air
A 1037 kg satellite orbits the Earth at a constant altitude of 108 km. How much energy must be added to the system to move the satellite
A piece of sandston with a bulk volume of 1.3 cc is contained ina 5-cc cell filled with helium at 760 mm Hg. Temperature ismaintained constant and the cell is opened to another evacuatedcell the same volume.
A glass rod that has been charged to + 17.0nC touches a metal sphere. Afterward, the rod's charge is + 9.0nC
an object is at a distance d to the left of a flath screen. A converging lens with focal length f
A particular guitar string is supposed to vibrate at 206 Hz, but itis measured to actually vibrate at 210 Hz. By what percent should the tension in the string be changed to get the frequency to the correct value?
A can of paint (volume = 3.74 10-3 m3) covers an area of 40.0 m2. What is the thickness of the paint on the wall
A bicycle wheel has an initial angular velocity of 16 radians/second and acceleraties to a final angular velocity of 42 radians/second, Determine the time required for this motion to occur
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 4.41 × 10-11 m. Determine the magnitude..
A stone dropped into a pond generates a travelling wave group approximately 1 m long; the waves within the group have a wavelength of about .1 m Estimate the range of the wavevector spectrum representing the group.
A 65kg, 1.70m tall person is standing in a room, Find the air temperature at which the heat transfer rate by radiation is just balanced by the rate of heat generation
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