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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.
A bowling ball is dropped from the top of a building that has a height of h = 135 m. Assuming air resistance is negligible, what is the ball's speed, vf in m/s, when it strikes the ground?
a small current loop of area a 0.0008 m2 and moment of inertia i 6.9e-07kgm2 carries a currentnbsp i 0.0039a with
A rifle with a weight of 30 N fires a 3.0 g bullet with a speed of 210 m/s. Find the recoil speed of the rifle
the bright yellow sodium line in the sodium spectrum is actually a pair of closely spaced lines at 589.0nm and 589.6
A proton and an alpha particle are momentarily at rest at adistance r from each other. They then begin to move apart. Find thespeed of the proton by the time the distance between the proton andthe alpha particle doubles. Both particles are positiv..
A moving particle encounters an external electric field that decreases its kenetic energy from 9640 eV to 6490 eV as the particle moves from position A to position B.
An infinitely long, uniformly charged line of charge with linear density lamda = .1 C/m lies a distance of .68 m from the center of a sphere with radius .23 m, What is the amount of charge inside the sphere
A bar 5.0 m long has its center of gravity 1.5 m from the heavy end. What is the weight of the bar
An ultracentrifuge is sometimes used to separate chemicals and other materials by applying a huge ARTIFICIAL GRAVITY by means of extremely rapid rotation. Find the necessary rotational rate of this device
A ball thrown straight up at an initial speed of 14.0m/s reaches a maximum height of 7.6m. What fraction of the ball's initial kinetic energy is dissipated by air resistance as the ball moves upward?
2750 g of lead at 120 degrees C is added to .150 kg of 85 degrees C water. The heat of vaporization for water is 22.6 X 10^5 J/kg. How much water (in kg) evaporates
A monatomic ideal gas is heated while at a constant volume of 1x10^-3 m^3, using a 10 watt heater. How long was the heater on
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