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A particle moves in the xy-plane acted on by a conservative force described by the potential energy U(x,y) = 2x2 + 8y2 +12xy + 12x + 18, where U is in units of J and x and y are in m. (a) Calculate the magnitude and direction of the force on the particle at the point (x,y) = (2, - 1). (b) At what point(s) is there no force?
Calculate the gravitational and the Coulomb force for a Hydrogen atom with the electron and proton separated by 5x10-11m and Compute the ratio Fcoul/Fgrav. coulumb force/gravitational force
point charges of -10 microc 1.0 microc and 10 microc are located along the x axis at x -1.0 cm x 0 and x 1.0 cm
Two blocks are connected by a light cord. One block, of mass 4kg, sits on a horizontal table with static and kinetic coefficients of friction of 0.6 and 0.4, respectively, whereas the other block, of 2 kg mass, hangs over a frictionless light pull..
A cylindrical resistor of radius 4.2 mm and length 2.4 cm is made of material that has a resistivity of 3.50×10-5 ? m. What is the current density when the energy dissipation rate in the resistor is 1.0 W? What is the potential difference?
A small electric car overcomes a 250 N friction force when traveling 30 km/h. How much power is dissipated in the coils
Suppose a bat uses sound echoes to locate its insect prey, 3.00 m away. What is the percent uncertainty does this cause for the bat in locating the insect
The corners of an equilateral triangle lie on a circle that has a radius of .25m. What is the length of a side of the triangle
A motorcycle and 59.5 kilogram rider accelerate at 3.0 m/s2 up a ramp inclined 10 degree above the horizontal. Obtain the magnitude of the net force on the rider
We did this lab where we needed to see how velocity is related to centripetal force. What we did is we had a hanging mass held by a string that goes through a glass tube. Obtain in what ways did you control your variables
A barrel contains a 0.130 {\rm m} layer of oil of density620 {\rm{{\rm kg}/{\rm m}}}^{\rm{3}}floating on water that is 0.290 {\rm m} deep. What is the gauge pressure at the bottom of the barrel
A conducting rod ( length = 80 cm ) rotates at a constant angularrate of 15 revolution per second about a pivot at one end. Auniform field (B = 60 mT) is directed perpendicularly to the planeof rotation. what is the magnitude of the emf induced betwe..
A freezer is used to freeze 5.0 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0°C. Determine the change in the entropy of the water
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