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A horizontal tube with length L has two positive charges +Q1 and +Q2 on the edges. A small ball can move without friction inside the tube (see figure). This small ball has a charge +Q and the same diameter as the tube. Find the static equilibrium position for the small ball. (sigma F = 0). Hint: Ignore the gravity. Express the result as a function of Q1, Q2 and L.
It requires 78.73 J of work to lift a rock to a height of 4.03 m. What is the mass of the rock
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles , What is the force between the two alpha particles
What are the units of electric potential? How is electric potential measured? Please keep solution simple and short and please no copy and paste
A 75 N/m spring is suspended vertically with nothing attached to it and rests at equilibrium. Then a mass is attached to the spring and given a nudge. Determine the mass attached to the spring
It takes the elevator in a skyscraper 4.1s to reach its cruising speed of 13m/s. A 68kg passenger gets aboard on the ground floor. find the passenger's weight before the elevator starts moving
Suppose you want to produce photoelectrons with kinetic energy 1.60eV from a copper target. What wavelength of electromagnetic radiation should you use
In an emergency stop to avoid an accident, a shoulder-strap seat belt holds a 60 kilogram passenger firmly in place. find the average force applied to the passenger by the seatbelt
A student throws a set of keys vertically upward to her sister in a window 4.0 m above. The keys are caught 1.5 s later by the sister’s outstretched h&. Find initial speed were the keys thrown?
an object that is 5 cm in height is placed 15 cm in front of a diverging lens with a focal length of -35 cm. what is
a cylinder with initial volume v contains a sample of gas at pressure p. on one end of the cylinder a piston is let
What is the acceleration of the car
A model rocket blasts off from the ground, rising straight upward with fix acceleration that has a magnitude of 86.7m/s2 for 1.79 sec, Find what maximum altitude will the rocket reach
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