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For a source charge of q and a test charge q, separated by a distance r, the electric potential energy of the test charge is kQr/ r. If two alpha particles (each has two protons and two neutrons) are 0.5 meters apart, what is the electric potential energy of the system.
Venus makes one complete orbit of the Sun every 0.615 years. Calculate the radius of the orbit of Venus
An arterial constriction causes the radius of an artery to decrease from its normal value of 4mm to 2.5 mm. Calculate the volume flow rate through the artery
A pendulum is constructed by attaching a small metal ball to one end of a 1.25 m long string that hangs from the ceiling. the ball is released when it is raised high enough for the string to make an angle of 30.0 degrees with the vertical. how fast i..
A heavy copper bus bar is 20.00 cm long and of rectangularcross-section, 1.000 cm x 2.000cm. what is the voltage dropalong its length when it carries 4.000 x 10^3 A
A 4.00 kg object is attached to a spring and placed on a horizontal, smooth surface. A horizontal force of 15.0 N is required to hold the object at rest, Find the maximum acceleration of the object
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 57.0 kg and a radius R = 0.625 m...
In a period of 1.0s, 5.0e23 nitrogen molecules stike a wall ofarea 8.0cm2. find the pressure exertedon the wall
Mount McKinley (also called Denali) is the tallest mountain in North America, with a height of 6,200 m above sea level. how much work is done by gravity on the person
An iron ball with a mass of 457.6 g is heated to an initial temperature of 413.7 degrees C and added to the water in the calorimeter.
The density of gasoline at 0 degrees celsius is 0.68E3 kg/m^3. What is the density on a hot day when the temperature is 35 degrees celsius
A satellite of mass 310 kg is launched from a site on the Equator into a circular orbit at 8000 km above Earth's surface. DATA: Rearth=6.38×106 m. a) What is the acceleration of gravity at this altitude? b) What is the speed of the satellite? c) What..
a transformer can be used to step-up or step-down voltage. Since the power must be constant, What is the current in the primary
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