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Q. High Powered Industrial Laser's output is pulsed, and produces 460 nm monochromatic light. Power of each pulse described by the function: P = 100 - (t-C)^2 + 0.25 (t-C)^4. P is measured in watts and C = square root of 20 seconds. Laser turns on when t = 0 seconds and shuts off when t = 2C seconds. a) Graph the power of the laser when it's on. b) Compute the energy in the pulse. c) Compute the number of photons in the pulse.
Take the questionnaire of Psychology and Your Life. Are you more consistent with right or left brain orientation? How will your strengths help you with your future goals.
What is the magnitude of the acceleration of a modified Atwood machine if the mass of the cart is 3 kg and the hanging mass is 4 kg? (Use g = 9.8 m/s2. Express your answer to one decimal point.)
A horse canters away from its trainer in a straight line, moving 140m away in 18s. It then turns abruptly and gallops halfway back in 4.9s.
A spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to the spring and allowed to come to rest. It is then pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57.0 ..
the magnitude of the net electric field. A lead ball is dropped into a lake from a diving board 6.40 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water.
A gas expands while 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.
What is an electric field between the plates? Towards which plate is it directed.
What was the temperature of the water before the insertion of the thermometer.
A cube of ice is taken from the freezer at -8.7^circ C and placed in a 114 g aluminium calorimeter filled with 329 g of water at room temperature of 20.0 ^circ {rm C}. The final situation is observed to be all water at 15.0^circ C.
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. compute the average velocity between t=0 and t=7.5 minutes.
An airplane is flying with a velocity of 97.0 at an angle of 25.0 above the horizontal. while the plane is a distance 103 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog ..
A person driving her car at 57km/h approaches an intersection just as the traffic light turns yellow. She knows that yellow light lasts only 2.0 s before turning to red, and she is 30m away from the near side of the intersection.
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