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A group of college students eager to get to Floride on a spring break drove the 637 mi trip with only minimum stops. They computed their average speed for the trip to be 54.2 mi/h. How many hours did the trip take? =-----h
a piece of purple plastic is charged with 8.06106 extra electrons compared to its neutral state. what is its net
Water at the top of Niagara Falls has a temperature of 20.0°C. calculate the increase in temperature of the water at the bottom of the falls
A TV remote control emits IR light. If the detector on the TV set is not to react to visible light, What is the shortest-wavelength light that can strike silicon without causing electrons to jump from the valence band to the conduction band
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 7.18x10-2 kg/s. What is the speed at which gasoline moves through the fuel line
A hollow sphere of inner radius 7.1 cm and outer radius 9.7 cm floats half submerged in a liquid of density 510 kg/m3. Calculate the density of the material of which the sphere is made
If the pressure of the 3.0-cm3 volume is reduced to 2.6 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
A father pushes horizontally on his daughter's sled to move it up a snowy incline, as illustrated in the figure, with h = 3.8 m and ? = 18°. how much work is done by the father in moving it from the bottom to the top of the hill
a diffraction pattern forms when light passes through a single slit. the wavelength of the light is 665 nm. determine
An electric field of 11.0 N/C directed due north is superposed on an existing electric field of 15.3 N/C directed due east
A copper rod has a length of 1.8 m and a cross-sectional area of 4.0 × 10-4 m2. What is the mass of ice per second that melts
A square uniform raft, 20m by 20m , of mass 7100kg , is used as a ferryboat. determine the CM of the loaded ferryboat
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.8 m/s, grabs him. find the mass of the receiver
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