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1. A 7.73 nC charge is located 1.87 m from a 3.86 nC point charge. Find the magnitude of the electrostatic force in one charge exertson the other. Is the force attractive or repulsive?
2. A small sphere of mass m= 7.60 g and a charge q1 = 29.9 nC is attracted to the end of a string and hangs vertically as in the figure. A second charge of equal mass and charge q2 = -58.0 nC is located below the first charge a distance d = 2.00 cm below the first charge. Find the tension in the string. If the string can withstand a maximum tension of 0.180 N, what is the smallest value d can have before the string breaks?
What is the torque on the root of the tooth about point A.
A 17-cm-long microscope has an eyepiece with a focal length of 3.1cm and an objective with a focal length of 0.35cm. What is the approximate magnification
Find out the vertical component of the reaction force
A hoop (I = MR^2) of mass 2.0 kg and radius 0.50 m is rolling at a center-of-mass speed of 15 m/s. What is the new speed of the center of mass of the hoop?
The pressure in a water pipe in the basement of an apartment house is 4.10x10^5 Pa, determine the height between the basement and the seventh floor
A concave shaving mirror has a focal length of 33 cm. Calculate the image position of a cologne bottle placed in front of the mirror at a distance of 93 cm. how large it is with respect to the object
A 2.00-mol sample of hydrogen gas is heated at constant pressure from 302 K to 414 K. Calculate the energy transferred to the gas by heat
A 1200-kg station wagon is moving along a straight highway at 12.0 m/s. Another car, with mass 1800 kg, Find the total momentum of the system
Two parallel metal rods form a plane inclined at 20 degrees to the horizontal. The upper end of the rods are connected together by a resistor of 166ohms, What is the maximum speed of the bar
A student doing an experiment pours 0.160kg of heated copper shot into a 0.355-kg aluminum calorimeter cup containing 0.240kg of water. What was the initial temperature of the shot
A barge of mass 5.0 104 kg is pulled along the Erie Canal by two mules, How much work is done on the barge by both of these mules together as they pull the barge 150 m along the canal
Sunlight strikes a piece of crown glass at an angle of incidence of 30.0 degrees. Calculate the difference in the angle of refraction between a red (660.0 nm) and a blue (470.0 nm) ray
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