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One point-like charge of -20 nC is placed 3 cm away from a very large planar sheet of charge. The surface charge density is constant and has the value of +20 nC/cm^2
a) Give the electric force exerted on the point charge.
b) Find the locations where the electric field is zero.
A person with a near-point distance of 37 cm is able to get a usable magnification of 15 with a particular magnifying glass. What is the friend's near-point distance
You have been given 4.4584807 g of copper from which you are to fashion a wire whose resistance is 1.2941073 ohms. What will the diameter of the wire be that you fashion
A 75.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. how fast was the ball travelling
a 1.50 m section of it at one end is bent 90° in the negative z direction. Illustrate what is the total magnetic flux through the surface? Choose directions for the area vectors so that the flux through each surface is positive.
The tires on a mew car have a diameter of 2ft and are warranted for60 000 miles. determine the angle (in radians)through which one of these tires will rotate during the warranty period.
The unstable isotope 234Th decays by beta emission with a half-life of 24.5 days. what is the decay rate after 37 days
A 50.0-Ω resistor is connected to a 30.0-μFcapacitor and to a 60.0-Hz, 100-V (rms) source. Find the power factor and the average power delivered to the circuit
The potential difference across a coil is 11V at an instant when the current through the coil is decreasing at a rate of 38A/s . What is the coil's inductance
A flat (unbanked) curve on a highway has a radius of 220 m. A car rounds the curve at a speed of 18.0m/s. What is the minimum coefficient of friction that will prevent sliding
A canoe has a velocity of 0.550 southeast relative to the earth. The canoe is on a river that is flowing at 0.510 east relative to the earth. Find the magnitude of the velocity of the canoe relative to the river.
A village maintains a large tank with an open top, containing water for emergencies. Calculate the friction force exerted by the nozzle on the stopper
An inquisitive physics student and mountain climber climbs a 55 m cliff that overhangs a calm pool of water. At what time after release of the first stone will the two stones hit the water
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