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The first bright fringe of a diffraction grating of 600 ruling/mm is found at angle of 21o. Evaluate what the wavelength of light of the source.
As a part of a New Year's celebration, a boy is needed to cause a wheel adorned with sparklers to spin rapidly. To accomplish this, the boy wound a 6 m long rope around the 13 cm diameter axle of the wheel.
starting from rest an electric drill rotates with constant angular acceleration. after the drill has rotated through a
FM station KCOM transmits simultaneously, at a frequency of 99.9 MHz, from two broadcast towers placed precisely 31.5 m apart along a north-south line. What is the wavelength of KCOM's transmissions
Show that with equal values for the object and image distances (Do=Di), they must both be equal to twice the focal length: Do=Di=2f. What is the predicted magnification
two stationary positive point charges charge 1 of magnitude 3.35 and charge 2 of magnitude 1.55 are separated by a
An air-filled toroidal solenoid has a mean radius of 15.1cm and a cross-sectional area of 4.95cm2, find the least number of turns that the winding must have
The 1.20kg head of a hammer has a speed of 8.1m/s just before it strikes a nail and is brought to rest. Estimate the temperature rise of a 14gg iron nail generated by 5.0 such hammer blows done in quick succession
A 30 kg girl who's running at 3 m/s jumps on a stationary 10 kg sled on a frozen lake. How fast does the sledwith the girl on it move
Electrons in an x-ray machine are accelerated from restthrough a potential difference of 50 000V. what is the kinetic energy of each of these electrons in eV
q1. a 3.72 g bullet moving at 290 ms enters and stops in an initially stationary 3.30 kg wooden block on a horizontal
The coefficient of kinetic friction between her skis and the snow.
A 1000N force inclined at 40 degrees with the horizontal is applied to move a block mass 150kg. compute the normal force acting on block
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