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Two small plastic spheres are given positive electrical charges. When they are 20.0cm apart, the repulsive force between them has magnitude 0.300 N. What is the charge on each sphere if the two charges are equal? What is the charge on each sphere if one sphere has four times the charge of the other?
The nucleus of the hydrogen atom has a radius of about 1.1 x 10-15 m. The electron is at a distance of about 5.2 x 10-11 m from the nucleus. find the volume of the atom
Suppose white light falls on two slits separated by a shortdistance. One slit is covered by a red filter (700 nm) andthe other by a blue (450 nm) filter. Describe the pattern on the screen
The weight of an object at the surface of a planet isporportional to the plants mass and inversely porportional to thesquare of the radius of the plane, How much would it weigh on Jupiter
A woman walks for 4 min directly north with a average velocity of 6 km/h; then she walks eastward at 4 km/h for 10 min. What is the magnitude of her average velocity
The drill bit of a variable-speed electric drill has a constant angular acceleration of 5.21 rad/s2. The initial angular speed of the bit is 5.12 rad/s. what is the bit's angular speed
assume that adults have iq scores that are normally distributed with a mean of 105 and a standard deviation of 20. find
A fountain shoots a jet of water 10 m into the air. The fountainhas a round nozzle of diameter 1.84 cm at ground level, fed by a pump located 6 m belowground through a round pipe of diameter 5.19 cm.
What is the value of the static friction.
In the vertical case the maximum tension in the string is 18.0% larger than the tension that exists when the circle is horizontal. Identify the speed of the stone.
two charges, q1 and q2 are present on a normal coordinate system ,point A is located at the orgin, q1 has a charge of 1.11 nC, what is the electric potential at point A
A conductor with cross-sectional area 6 cm^2 carries a current of 15 A. what is the drift velocity of the electrons
The electron beam Cathodes and anodes An electron gun usually consists of a cathode and an anode. The cathode is a filament that is connected to a potential difference (filament voltage), and the resulting current heats the filament to incandescen..
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