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A pulsed laser emits light at a wavelength of 480.7 nm. The pulse duration is 12.1 ps and the energy per pulse is 0.190 J.
(a) What is the length of the pulse?
(b) How many photons are emitted in each pulse?
What are the magnitude and direction of the net force. how long does it take for the police car to catch up with the speeder.
find the minimum size of the snowshoes needed.
A satellite is in a low circular orbit about the Earth (such as it just skims the surface of the Earth). How long does it take to make one revolution around Earth.
A transformer connected to a 125 V (rms) ac line is to supply 12000 V (rms) for a neon sign. What current rating should the fuse in the primary circuit have
How greatly time elapses before the compass hits the ground
The measured conductivity of Cu at Room Temperature is 5.88 x 107/ohm.m and the Fermi energy for Cu is 7.03 eV, Find the mean free path( mfp) of electrons in copper
Julie drives 100 mi to her Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 25mph and the other half at 80. On her return trip, she drives half time at 25mph and half the time at 80 mph.
A 87 g arrow is fired from a bow whose string exerts an average force of 105 N on the arrow over a distance of 76 cm. Illustrate what is the speed of the arrow as it leaves the bow?
The specific heat capacity of the material use to make the block is C resolve the temperature rise that results from the collision in terms of C and the other given quantities.( suppose that no energy is transferred to the track or the surrounding..
A tennis ball gun launches tennis balls at 17.6 m/s . It's pointed straight up and launches one ball; 2.0 s later, it launches a second ball. I already found - At what time (after the first launch) are the two balls at the same height? = 2.8s What..
We can reasonably model a 90-W incandescent lightbulb as a sphere 5.5cm in diameter. find the visible light intensity at the surface of the bulb
The eyepiece of a refracting telescope (see Fig.34.53 in the textbook) has a focal length of 9.00 cm. What is the angular magnification of the telescope
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