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A charge of -5 micro-coulombs is placed at x = 0 cm, y = 0 cm. Another charge of -5 micro-coulombs is placed at x = +22 cm, y = -50 cm. When measured counter-clockwise from the x axis, what angle is the electric force vector acting on the charge at x = 0 cm, y = 0 cm directed?
A converging lens has a focal length of f = 26 cm. An object is placed 39 cm from the lens. Find out the size of an image in cm if the object has a height of 5 cm. express answer with one decimal place.
Calculating magnetic flux, induced current & magnetic field.
Recently we were padding on a boat in a sea. Surprisingly we saw gleaming points in water during padding. Would you explain about this.
What was the initial negative charge on one of the spheres, and what was the initial positive charge on the other? (Hint: Use charge conservation and solve for one of the initial charges. You would end up with a quadratic equation. The solutions g..
A loudspeaker of mass 20 is suspended a distance of 2 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 2.90.
A horse canters away from its trainer in a straight line, moving 140m away in 18s. It then turns abruptly and gallops halfway back in 4.9s.
Drawing on Eratoshthenes' method, if two observers are due north and south of each other and are separated by 400 km, what is circumference of their spherical world if they see the similar star on their meridian at altitudes of 23degrees and 47deg..
To what angle beta can the sculpture be tipped.
A 94 g stone is whirled in a horizontal circle on the end of a 73 cm long string. The stone takes 1.10 s to make each complete revolution. Conclude the angle that the string makes with the horizontal.
A 795 kg car moving at 26 m/s brakes to a stop. The brakes contain about 15 kg of iron, that absorbs the energy. What is the increase in temperature of the brakes.
what is the acceleration of the wallet. If the contact between ball and ground lasted 1.6ms, what average force was exerted on ball.
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -42 µC. How many excess electrons does she get, and by how much does her mass increase?
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