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Two identical pith balls are hung by insulating strings, touching each other, as in the picture below. The mass of each ball is 0.002kg. The strings are 28cm long. The two balls, while touching each other, are touched simultaneously to a charged rod. After they are touched by the rod, they move apart. The angle between the strings is eight degrees, as shown in the diagram below. Determine the charge on each ball. Show your work and explain your reasoning.
A 1800 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 6 m before coming into contact with the top of the beam, and it drives the beam 14.0 cm farther into the ground before coming to rest.
A solid lead sphere of volume 0.40m^3, dropped in the ocean, sinks to a depth of2.0*10^3 (about 1 mile), What is the change in volume of the sphere
When these two wires are connected in equivalent to the same battery, describe the reasoning of the steps that allow you to find out which of these wires will consume the greater amount of power by warming up and dissipating this energy as heat.
A 4 m long rope weighing 1.4 N is stretched so that the tension is 10 N. The left end is then made to oscillate vertically at 4 Hz by shaking the rope up, What is the speed of the traveling waves on the rope
A student at another university repeats the experiment you did in lab. What is the kinetic energy (in joules) of the target ball just after it is struck
here is a point on the x-axis between the two charges where the electric field is zero. Find out the location of the point where the electric field is zero.
A plane leaves the airport in Galisto and flies 159km 68 degrees east of north and after that changes direction to fly 242km at 48 degrees south of east, after which it makes an immediate emergency landing in a pasture.
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.
Find the magnitude of book's velocity, just before the book reaches the floor. Find the direction of book's velocity, just before the book reaches the floor.
What is the Bens kinetic energy
Draw two diagrams for the situation where a moving train (with initial speed v0) collides elastically with a target train that is not intially moving, Show that the final velocity of each train will be:
A 2.80x 10^2 W electric immersion heater is used to heat a cup of water. The cup is made of glass and its mass is 3x10^2 g. It contains 250g of water at 15°C.
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