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A 15mw energy laser has beam exit diameter of 2cm and beam divergence of 0.0002radians. Compute power density of beam at 100meters away from source.
Quantum, solve 14 and 15 and 11-13- 10- 9- 2 -6- step by step without jumping and explain more because I wanna understand
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Explain how does the use of H II regions to find out a galaxy's distance distinct from the use of Cepheid variables?
How does the use of H II regions to find a galaxy's distance distinct from the use of Cepheid variables? in question 4 concentrate on the places we find H II regions and Cepheid variables and the di
A force of 20 N was used to push a box all along the floor a distance of 6 m. How much work was done?
Determine the power rating of an appliance which uses 8 amps of current when plugged into a 120 volt outlet.
If a power source gives 54 watts of power to operate a machine which draws 4.5 amps of current when in use, determine the voltage used by the machine?
Silver consists of a resistance of 0.00198 ohms. What voltage would produce a current of 100 A?
A one pound weight is released 3 feet off the ground. At the same time a two pound weight is released 5 feet off the ground. When will the two weights have the same altitude? Assume no air friction
A man exerts a force of 60N straight up to lift a watermelon that weighs 2.5 Kg. What is the acceleration of the watermelon?
Two seconds after the stone releases from the tire, it makes a perfectly inelastic collision with a 29.7 g glob of waz that is at the maximum height of a vertical projection.
Sled is being pulled across a cement sidewalk at constant velocity. The coefficient of friction, mu, between the cement and sled runners is 0.77. What is the kinetic friction force acting on the sl
A ball is thrown at an angle of 30 degrees with an initial velocity of 20 m/s at an elevation of 10 m. How long will it take to hit the ground? How far did it go?
Initially, A yoga ball is partially blown up and its surface area measured. Afterwards, it is filled completely and its surface area is found to be 1.60 times as big as it was recorded earlier. By
A particle is moving along a straight line with the acceleration a (12t-3t^1/2)ft/s^2 where t is in seconds.Determine the velocity of the particle as a function of time. When t=0,v=0 , and s= 15 .
Initially, A yoga ball is partially blown up and its surface area measured. Afterwards, it is filled completely and its surface area is found to be 1.06 times as big as it was recorded earlier. By
In 1910 Rutherford performed a classic experiment in which he directed a beam of alpha particles at a thin gold foil. He unexpectedly observed a few of the particles scattered almost directly backwa
Suppose the potential difference across the cell wall is 0.103 V. Find the magnitude of the charge stored on either side of the cell wall per cm2.