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Three charges, q1=2.5 μC, q2=2.0 μC and q3=-6.0 μC are placed at positions r1=(-20,10)cm, r2=(0,30)cm and r3=(25,-25)cm.
(a) Calculate the intensity of the electric field produced by q1 and q2 at the point where q3 is.
(b) Calculate the net force on q3.
(c) Calculate the total potential energy of the system of charges.
A 7320 kg satellite has an elliptical orbit. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. Find the work done by the gravitational force when the satellite moves from the ap..
A block of wood weighs 50.0 N whenweighed in air. A sinker is attached to the block, and the weightof the wood-sinker combination is 220N when the sinker alone is immersed in water. Find the density of the block
According to a simplified model, the hydrogen atom consists of a proton circled by an electron orbiting at a radius of 5.2x10^-11m. hot fast must an electron be moving if the required centripetal force is provided by the electric force exerted by the..
A magnetic fi eld is oriented at an angle = 60 degrees to the normal of a rectangular area. If the magnetic fi eld has a strength of B = 4*10^-3T, what is the area of a rectangle
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 2.70 104 s. What is the speed at which the satellite travels
A nearsighted patient's far point is 0.645 m from her eyes. She is able to see distant objects in focus when wearing glasses by a refractive power of -1.6 diopters. What is the distance among her eyes and the glasses?
A 25 pF parallel-plate capacitor with an air gap between the plates is connected to a 100 V battery. What is the change in the charge on the positive plate
we drop a cube of ice into a glass of water. the mass of the cube of ice is 45.8 g and its initial temperature is -10.2
A rifle bullet with mass 8.00 g strikes and embeds itself in ablock with mass 0.992 kg that rests on a frictionless, What was the initial speed of the bullet
A crate of mass m = 33 kg rides on the bed of a truck attached by a cord to the back of the cab, find the maximum acceleration the truck can have before the cord breaks
The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Suppose that only static friction supplies the centripetal force, & find the radius r of the tyre.
An airplane is cruising at an altitude of 10 km. Model the air as an ideal fluid to find the speed of the stream of air flowing through the leak
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