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four charges are placed at the corners of a square of side 4 cm. What is the electrostatic potential energy of this system relative to infinity?
There are two +2 (microC) charges diagonal form each other and two -2 (microC) charges at the other corners.
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.53 m. A third charge of +2q is located on the x axis at such a place that the net electrostatic force on the charge at the origin doubles, its direc..
The equations for free fall at the surface of Mars and Jupiter (s in meters, t in seconds) are Mars, s = 1.86t^2; Jupiter, s = 11.44t^2. How long would it take an object falling from rest to reach a velocity of 100 km/hr on each planet?
An extremely thin film of soapy water (n=1.36) sits on top of a flat glass plate with n=1.11. What is the thickness of the film
Calculate the smallest amount of kinetic energy the electron must have in order to leave its circular orbit and move to infinity far from the proton
A standard deck of cards contains 52 different cards. How many different poker hands are there
In a car collision, the driver's body must change speed from a high value to zero. This is true whether or not an airbag is used, How does it reduce injury
In a certain time period a coil of wire is rotated from one orientation to another regarding a uniform 0.38-T magnetic field. The emf induced in the coil is 3.5 V. Other things being equal, what will the induced emf be if the field had a magnitude..
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.
A light spring of force constant k = 156 N/m rests vertically on the bottom of a large beaker of water. A 5.55-kg block of wood (density = 650 kg/m3) is connected to the spring, and block-spring system is allowed to come to static equilibrium. Wha..
A conducting wire formed in the shape of a right triangle with base b = 38 cm and height h = 63 cm, What is the angular frequency of rotation
For a Nd:YAG laser there are four pump levels located at 1.00 eV, 1.24 eV, 2.40 eV, and 2.54 eV. What is shortest possible pump wavelength (in nanometers) that could be used to populate any of the excited energy levels
The police officer, knowing that the coefficient of kinetic friction between tires and road is 0.80, compute the speed of the sports car at impact.
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