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Q1. Three equal point charges, each with a charge of 1.90 mu C, are placed at the corners of an equilateral triangle whose sides have the length of 0.470 m. What is the potential energy of the system?
Q2. A solid, rectangular iron bar measures .40cm by 1.0cm by 30cm. Find the resistance between each of the three pairs of opposing faces, assume the faces in question are quipotentials.
Q3. A freight train has a mass of 1.7 × 10^7 kg. If the locomotive can exert a constant pull of 6.6 × 10^5 N, how long does it take to increase the speed of train from rest to 87 km/h?
A car enters a 300-m radius flat curve on a rainy day when the coefficient of static friction between its tires and the road is 0.600. what is the maximum speed if the ramp is banked 30 degrees
Consult Interactive Solution 27.18 to review a model for solving this problem. what is the longest visible wavelength (in vacuum) for which the film will appear bright due to constructive interference
Light from a star has an intensity of about 75.5×10-8W/m2. how far away is it from Earth
Calculate the mass of a solid gold rectanglar bar that has dimensions lwh = 4.20 cm x 12.0 cm x 30.0 cm. (the density of gold is 19.3x10^3 kg/m^3.)
Explain how does a magnitude of the electrical force between a pair of charged particles change when they are brought to half their original distance of seperation?
A copper (cu) penny has a mass of 3.11 g. The molar mass of copper is 63.5 g/mol. How many atoms of Cu are there ? what fraction of the electrons have been removed
Mattwe pulls his little sister sarah in a sled on an icy surface, with a force of 60 N at an angle of 37 ° upward from the horizontal. If he pulls her a distance of 12m, then determine the work done by matthew?
A current loop, carrying a current of 3.0 A, is in the shape of a right triangle with sides 30, 40, and 50 cm. Find the magnetic dipole moment of the loop
A 535 g ball swings in a vertical circle at the end of a 1.4 m-long string. When the ball is at the bottom of the circle, the tension in the string is 22 N. Illustrate what is the speed of the ball at that point?
What average force athletes legs apply on a ground
A meter stick travels past an observer at the speed of 0.9c. What length would be recorded by the observer
Estimate the area of the plates needed to achieve a capacitance of 1 F, given the same air gap, What is the electric field between the plates
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