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A 50 kg student obtains in a 1000 kg elevator at rest. As the elevator begins to move, she has an apparent weight of 600 N for the first 3 s. How far has the elevator moved, and in which direction, at the end of 3 s?
two coupled boxcars are rolling along at 3.5 ms when they collide with and couple to a third stationary boxcar. a what
Determine the group and phase velocity of 8 MeV protons and 8 MeV electrons. For the phase velocity, find both the relativistic and non-relativistic results
A car heading north collides at an intersection with a truck heading east. If they lock together and travel at 28 m/s at 22° north of east just after the collision
the elimination of the Linens Department will result in a 10% decrease in the sales of the Hardware Department. If the Linens Department is dropped, illustrate what will be the effect on the net operating income of the company as a whole?
A neutron that is stationary. A neutrino that is speeding up from 1000m/s to 1200 m/s. An electron that is slowing down from 500 km/h to 400 km/h. A proton moving at a constant velocity of 60 mph due north. Anion moving in a circle while traveling at..
A small object of mass 1.90×10−2 kg andcharge 3.2 μC hangs from the ceiling by a thread. Asecond small object, with a charge of 4.2 μC isplaced 1.1 m vertically below the first charge. Find theelectric field at the position of the upper charge due..
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, so a sharp image always falls on the film. Over what distance must the lens be movable
A typical coal-fired plant generates 1000 MegaWatts of usable power at an overall thermal efficiency of 35%, What is the rate of heat input to the plant
An 78.3 centimeter long pendulum with a 0.516 kilogram bob is released from rest at an initial angle of θ0 with the vertical. At the bottom of the swing, Find what angle does the pendulum make with the vertical
As it enters a pipe, a perfect fluid has spped 3.70 m/s. As it exits the pipe, the speed is 10.6 m/s. what is the radius of the pipe at the exit
An object that is 35 cm in front of a convex mirror has an image located 14 cm behind the mirror. How far behind the mirror is the image located when the object is 28 cm in front of the mirror?
A glass fiber of index 1.50 is used to transmit light but is submerged in water of index 1.33. What is the critical angle for light to stay inside the optical fiber
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