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An object is under the force F = (k1*x) i - (k2*y) j. Calculate the work done by this force when the object:
a) moves on the x-axis from the origin to the point (a,0), and then goes from (a,0) until (a,b) parallel to the y-axis;
b) moves from the origin to the point (0,b), and then goes from (0,b) until (a,b) parallel to the x-axis.
A bare helium nucleus has two positive charges and a mass of 6.64 10-27 kg. What voltage would be needed to obtain this energy
A 48\Omega resistor is connected across a battery, and a 29mA current flows. What is the battery's emf? What is the internal resistance
A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2, find the volume flow rate Q of the gas
A man stands at one end of a 20.0 kg uniform board. What is the mass of the man if the center of the mass of the man-board system is 1.25 m from the man
A transverse periodic wave described by the expression y = 5sin(? x + 10?t) (where y and x are in meters and t is in seconds) is established on a string. Calculate the length of the string
A railroad train is traveling at 32.0 m/s in still air. The frequency of the note emitted by the locomotive whistle is 510 Hz. What is the wavelength of the sound waves in front of the locomotive
A train is rounding a circular curve whose radius is 2.00 multiply.gif 102 m. Find the magnitude of the total acceleration (centripetal plus tangential) of the train
A 2 meter wire carrying 0.9 A of current is at a 90 degree angle to a magnetic field. compute the strength of the field
Two forces, vector F 1 and vector F 2, act on the 5.00 kg block shown in the drawing. The magnitudes of the forces are F1 = 48.0 N and F2 = 39.0 N. What is the horizontal acceleration (magnitude and direction) of the block?
A 5.0 kg box, starting from rest, slides down a 5.0 m high frictionless hill, then across a 2.0 m wide horizontal surface, and finally hits a horizontal spring with spring constant 500 N/m. find the speed of the box just before hitting the spring
A proton orbits a long charged wire, making 1.6 x 106 revolutions per second. The radius of the orbit is 1.2 cm. whatis the wire's linear charge density
Light of 650 nm is incident on two slits. A maximum is seen at an angle of 5.74° and a minimum of 6.46°. What is the order m of the maximum
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