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In an inkjet printer, letters are built up by squirting dropsof ink at the paper from a rapidly moving nozzle. The pattern onthe paper is controlled by an electrostatic valve that determinesat each nozzle position whether ink is squirted onto the paper or not. The ink drops, 15.9 mm in radius,leave the nozzle and travel toward the paper at 18.1 m/s. The dropspass through a charging unit that gives each drop a positive chargeq when the drop loses some electrons. The drops then passbetween parallel deflecting plates 2 cm in length where there is auniform vertical electric field with magnitude 76000 N/C. If a dropis to be deflected 0.3 mm by the time it reaches the end of the deflection plate, what magnitude of charge must be given to the drop? (Assume that the density of the ink drop is the same as that of water, 1000 kg/m^3.)
Fighter airplane is flying horizontally at the altitude h=5000m with velocity of u=100m/s. When airplane passes directly above an air defense station, find the horizontal distance s from the fun to the point of impact
A simple pendulum with a period T = 2.00 s is attached to the ceiling of an elevator which is initially at rest, Calculate the period of oscillations when the elevator accelerates downwards
What happens to the resistance of copper wire after dunking it in liquid nitrogen? and what happens to the resistance of a carbon resistor when you dunk it in liquid nitrogen.
You have fabricated a one-dimensional well of width 12nm, and measurements show that the energy difference between the ground state and the first excited state is 0.16eV. What is the effective mass of the electrons
The heaviest and lightest strings on a certain violin have linear densities of 3.7 and 0.28 g/m. What is the ratio of the diameter of the heaviest string to that of the lightest string, assuming that the strings are of the same material?
a ball rolls down a 100m.the hill is inclined at 60 degrees. if the ball has a rotational inertia of 10kg-m^2 and starts from rest, what is the final rotational speed of the ball?(you must use the conservation of energy)
If 1.00 mol of oxygen is heated at constant pressure of 1.00 atm from 10.0?C to 25.0?C. What is the change of volume of the gas in this process
During a workout, the football players at Rutgers State University ran up the stadium stairs at a steady pace in 58 s. estimate the average power output on the way up
A ball is thrown directly downward with an initial speed of 7.70 m/s, from a height of 29.0 m. After what time interval does it strike the ground
An ambulance traveling at 47 m/s approaches a car heading in the same direction at a speed of 31 m/s. At what frequency does the driver of the car hear the siren
Long Straight Wire A long straight wire has fixed negative charge with a linear charge density of -3.1 nC/m. The wire is to be enclosed by a thin,nonconducting cylinder of outside radius 1.6 cm, coaxial with the wire.
The driver of a car wishes to pass a truck that is travelling at a constant speed of 20 meters per second. Initially, the car is also travelling at 20 meters per second and its front bumper is 24 meters behind truck's rear bumper.
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