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Two point charges lie on the x-axis. A charge of +2.40 pC is at the origin, and a charge of -4.80 pC is at x=-0.1m. What third charge should be placed at x=+0.2m so that the total electric field at x=+0.1m is zero?
A steel tank is completely filled with 2.70 m^3 of ethanol when both the tank and the ethanol are at a temperature of 31.0 degree C. When the tank and its contents have cooled to 17.5 degree C, what additional volume of ethanol can be put into the t..
One of the 61.0cm -long strings of an ordinary guitar is tuned to produce the note B3 (frequency 245 Hz) when vibrating in its fundamental mode. Find the speed of transverse waves on this string
The drawing shows the front and rear sprockets of a bicycle. Assume the chain does not slip or stretch. How much time is required to double the speed of the rear sprocket
A person is sitting at an angle θ off to the side of a diffraction horn that has a width D of 0.069 m. This individual does not hear a sound wave that has a frequency of 8700 Hz. When she is sitting at an angle of Π/2, the frequency that she does ..
What impulse Ft should be supplied to bring the ball to rest? If the ball is stopped in 0.03 s, what is the average force of the ball on the catcher's hand.
Two 4.0 cm × 4.0 cm electrodes spaced 2.0 mm apart form aparallel-plate capacitor. What is the charge on each electrode
two speakers 10m apart and facing each other emit identical in phase sound waves. if you stand between the speakers 2m
Estimate the average number of atoms comprising a bacterium for example Escherichia coli. Assume that the bacterium is a cylinder of 2mum length, 0.5mum diameter (and for practical purposed is made up mainly of water, which has a density of 1kg/liter..
A car is initially coasting at an unknown speed, when the driver hits the brake, causing the car to slow down at a uniform rate of 3.00 m/s2. What was the speed at which the car was initially coasting
Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work completed by each force.
A proton travels with a speed of 2.9×10^6 m/s at an angle 44 degrees with a magnetic ?eld of 0.99 T pointed in the +y direction. What is the magnitude of the magnetic force on the proton
a uniform electric field of magnitude 410 nc pointing in the positive x-direction acts on an electron which is
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