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In a Millikan-type experiment, two horizontal charged plates are 2.5 cm apart. A latex sphere of 1.3x10^-15 kg remains stationary between the plates when the potential difference between the plates is 400 V. The upper plate is charged positive and the bottom is negative. What is the charge on the sphere? And how many excess elementary charges are on the sphere?
The lifetime of the first excited state of a hydrogen atom is about 10 ns. What is the uncertainty in energy of the photon emitted when the atom returns to its ground state
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. How far has it traveled in this time
A cat is brought into a vets office you need to find itscenter of gravity. what is the total weight of the cat
Watch the video titled "Groundwater Contamination" (4 min 35 sec) under the Water Pollution terms section of the Science Corner. You can also view the video athttps://www.youtube.com/watch?v=5xs1jLlbztE. Next, explain the main reasons why some ground..
A force of 380 N pushes a 52 kg object. The coefficient of kinetic friction is 0.4. Find the acceleration of the box
A 798 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. Find the period of its revolution
The rms electric field of an electromagnetic wave increases from 320 to 960 N/C. (a) Determine the wave intensities for the two values of the electric field. (b) What is the rms magnetic field associated with each electric field? (c) Determine the wa..
A river flows due south with a speed of 2.0m/s. A man steers aboat across the river; his velocity relative to the water is 4.2m/sdue east. The river is 800m wide.
What is magnitude of the breaking force
At what speed, in m/s, would a moving clock lose 3.2 ns in 1.0 day according to experimenters on the ground?
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. It collides with and sticks to a rod of mass M = 2.0 kg and length L = 0.9 m which pivots about a fixed vertical axis at the opposite end of ..
As morning sunlight falls on a tethered helium balloon, it expands from a volume of 1.05 ×103 m3 to 1.15 ×103 m3. how many joules of solar energy are absorbed
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