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A laser pulse has an energy of 19 J and a beam radius of 2 mm. The pulse duration is 9 ns and the energy density is constant within the pulse.
What is the spatial length of the pulse?
What is the total energy density within the pulse?
You travel from "point" Columbia to St. Louis in a car moving at a constant speed of 60 km/h. Then you travel back from St. Louis to Columbia the same distance moving at a constant speed of 120 km/h.
A thin, uniform rod is hinged at its midpoint. To begin with, one half of the rod is bent upward and is perpendicular to the other half. What is the angular velocity of the straight rod
A bar of length 1.5 meters moves to the left at 4.6 m/s along a set of conducting rails. The rails and bar have a net resistance of 10 Ohms. Determine the induced electromotive force
An object is placed at a distance of 28 cm from a thin convex lens. The lens has a focal length of 9 cm. what are the values of the image distance and lateral magnification
An empty boat is placed in a freshwater lake and a mark is painted on the hull at the waterline, a line corresponding to the surface of the water when the vessel is floating upright, where is the new waterline mark located on hull of the boat
A commonly used method of fastening one part to another part is called "shrink fitting." By how many Celsius degrees should the rod be cooled
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. What is the work done on the jet by the catapult
A hot-air balloonist, rising vertically with a constant velocity of magnitude v= 5.00 m/s, releases a sandbag at an instant when the balloon is a height h= 40.0 m above the ground. Compute the position of the sandbag at a time 1.50 s after its rele..
a super-particle travels forward along a straight cylindrical tube at 1000 m/s for 10 m, What is the average velocity
The average speed of a nitrogen molecule in air is about 6.70*10^2 m/s, and its mass is about 4.68*10^-26 kg. What average force does the molecule exert on the wall
Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is ?A = 591nm. The other wavelength is ?B and is unknown. What is the unknown wavelength
A 0.20 kg hockey puck slides across a frictionless ice rink at a constant speed of 25 m/s. Ignoring air resistance, what is the work done on the puck while it is sliding
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