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High power lasers in factories are used to cut through cloth and metal. One such laser has a beam diameter of 0.407 mm and generates an electric ?eld at the target having an amplitude 0.985 MV/m. The speed of light is 2.99792 × 10^8 m/s the permeability of free space is 4? ×10^?7 Amplitude of Magnetic field = 3.29e-3 T Intensity of laser = 1.29e9 W/m^2 What is the power dissipated? Answer in units of W
A particular radioactive sample undergoes 3.60x10^6 decays/s. What is the activity of the sample in the following in curies
A roller coaster is traveling at 5 m/s at the top of a hill 40 m above the ground. What is the speed of the roller coaster when it is 15 m above the ground
A space traveller whose mass is 115 kg leaves earth. What are his weight and masson earth and in interplanetary space where there are no nearby planetary objects.
a 6.00 kg bowling ball is rolling at 9.00 m/s. It collides with a 1.50 kg bowling pin at rest. What is the velocity of the ball after the collision
Three point charges are located at the corners of an equilateral triangle as shown below. Calculate the resultant electric force on the 7.00 µC charge
Consider a parallel plate capacitor composed of two very large (approximate as infinite) square plates, What is the distance between the plates
Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume of a cavern is 4.9 Ã- 105 m3, how many homes could this internal energy serve
an ideal gas has a pressure of 2.5, a volume of 1.0L at a temperature of 30degress C. How many molecules are there in the gas
The skis have a thrust of 190 . Sam's speed at the bottom is 35.0 . Illustrate what is the coefficient of kinetic friction of his skis on snow?
What was the velocity of the bullet just before it struck the wooden block? The length of the string is 2 meters.
If a positron (a positively charged particle with the mass of the electron) and a proton go through the same potential difference, By what factor is the wavelength shorter
As a treatment for chronic back pain, a medical patient may be fitted with a device that passes a small electrical current , how many electrons pass through the muscles during one pulse
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