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Two 1.5cm -diameter disks face each other, 1.1mm apart. They are charged to ±20nC.
A) What is the electric field strength between the disks?
B) A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?
Calculate the speed of a proton after it accelerates from rest through a potential difference of 170V, Calculate the speed of an electron
It's nighttime, and you've dropped your goggles into a 2.8m deep swimming pool. If you hold a laser pointer 0.90m above the edge of the pool, How far are the goggles from the edge of the pool
An electric field of 8.55x10^5 V/m is desired between two parallel plates, each of area 35.00 cm^2 and separated by 2.45mm of air. What charge should be on each plate.
A spring with spring constant 14 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 and released. The ball makes 17 oscillations in 16 seconds. What is it the mass of ball.
When the afternoon Sun reaches an angle of 27.0° above the horizon, sunlight ceases to illuminate the bottom of the tank. Evaluate how deep is the tank?
Some skin divers go as deep as 50 m. What is the gage pressure at this depth in fresh water, and what is the ratio of absolute pressure at this depth to normal atmospheric pressure.
What is the highest speed with which an 1180-kg car can round a turn of radius 75.00 m on a flat road if the coefficient of static friction between tires and road is 0.80.
The person in the middle weighs 190 N, and the tensions in each rope are 200-N. What is the weight of the staging.
Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.3 km x 0.3 km, What is the mass of the mud sitting above a 4 m2 area of the valley floor
An unmarked police car travelling a constant 80 km/h is passed by the speeder travelling 100 km/h. precisely l.0s after the speeder passes, the policeman steps on an accelerator; if the police car's acceleration is 2.0m/s2, how much time passes befor..
A proton is projected in the positive x direction into a region of uniform electric field = (-5.20E5) N/C at t = 0. The proton travels 6.20 cm as it comes to rest, Determine the initial speed of the proton
A distant galaxy emits light that has a wavelength of 699.1 nm. On earth, the wavelength of this light is measured to be 701.6 nm, Decide whether this galaxy is approaching or receding from the earth
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