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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.
RLC alternating current circuit with a 25 ohm resistor, What is the average power when operating at twice the resonant frequency
express what would be the frequency of vibrations.
An 845-N sled is pulled a distance of 186m. The task requires 1.2 multiplied by 104 J of work and is done by pulling on a rope with a force of 133-N. At what angle is the rope held.
An insulated Thermos contains 119 cm3 of hot coffee at 64 °C. You put a 12g ice cube at its melting point to cool the coffee. By how a lot of degrees have your coffee cooled once the ice has melted and equilibrium is reached.
A window in a house is rectangular, with height 49 cm and width 29 cm. What is the force on the window
If the spring stretches by 2.4cm, what is the coefficient of static friction between the backpack and the table.
A person's right eye can see objects clearly only if they are between 27cm and 86cm away. What will be the near point with the lens in place
Assume the ball leaves Sarah's hand a distance 1.5 meters above the ground, reaches a maximum height of 15.0 m above the ground, and takes 2.692 s to get directly over Julie's head. What is the speed of the ball when it leaves Sarah's hand? m/s 6)..
The train comes to a stop 6m from the point at which it was released. What is the magnitude of train's acceleration after its wheel begins to stick.
A charge of -2.6 × 10-9 C is at the origin and a charge of 8.1 × 10-9 C is on x-axis at x = 3 m. At what two locations on the x-axis (xpositive, xnegative) is the potential zero.
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium and other materials. A typical mantle contains 439 mg of thorium. What is the reactivity of the mantle
White light, with frequencies ranging from 4.20×1014 Hz to 7.74×1014 Hz, is incident on a calcium surface. Calculate the lowest frequency for which no electrons are ejected
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