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A 150MW laser pulse is focused with a lens to a diameter of 1.0?m .
What is the laser beam's electric field amplitude at the focal point?
What is the ration of the laser beam's electric field to the electric field that keeps the electron bound to the proton of a hydrogen atom? The radius of the eletron's orbit is 0.053 nm. E0/E = ?
Strictly speaking, as more and more skyscrapers are being built on surface of earth, does the day tend to become longer or shorter.
Two runners start simultaneously from the same point on the circular 200 m track and run in opposite directions. One runs at a constant speed of 6.14 m/s and the other runs at a constant speed of 5.43m/s. When they first meet, for how long a time ..
A 10 μF capacitor is charged to 15 V. It is next connected in series with an uncharged 5.00-μF capacitor. The series combination is finally connected across a 50.0-V battery, as diagrammed. Find out the new potential differences across the 5-μF an..
Inertia and torque of the rotating bodies.
Four charged particles are at the corners of a square of side. (Let A = 3, B = 4, and C = 5.) (a) Determine the electric field at the location of charge q.
The springs of a 1500kg car compress 6.0mmwhen its 61kg driver gets into the driver's seat. what will be the frequency of oscillations
A capacitor with air between its plates is charged to 70 V and then disconnected from the battery. When a piece of glass is placed between the plates, the voltage across the capacitor drops to 50 V. What is the dielectric constant of this glass?
A photon with a wavelength 4.40 scatters from an electron initially at rest. Find out the wavelength of the scattered photon when the scattered electron has its utmost kinetic energy. Kmax = 2.37*20^-14.
A rectangular sample of a metal is 3.5 cm wide and 475 µm thick. When it carries a 42 A current and is placed in a 0.8 T magnetic field it produces a 6.5 µV Hall emf, Determine the Hall field in the conductor
If the partial pressure of water vapor is 47 mm Hg in the lungs at 760 mm Hg pressure, what percentage of air does the water vapor constitute?
The wavelength of an ocean wave
A surface completely surrounds a 3.5 × 10-6 C charge. Find the electric flux through this surface when the surface is (a) a sphere with a radius of 0.59 m, (b) a sphere with a radius of 0.16 m, and (c) a cube with edges that are 0.27 m long.
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