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A laser beam whose wavelength is 681 nm falls on a barrier containing a pair of very narrow slits. A screen is located 2.61 m from the slits. The ratio is 0.0160 between the intensity at a distance of 1.27 cm from the centerline, and the intensity at the peak of the central maximum. What is the separation between the centers of the two slits? Note that in this situation, the point that lies a distance of 1.27 cm from the centerline still lies on the central peak. The first intensity minimum is just beyond this point.
calculate the speed of an electron that is accelerated through the same potential difference, and Calculate the speed of a proton
A 21 g bullet travelling at 255 m/s is fired into a 0.452 kg wooden block anchored to a 100 N/m spring. How far is spring compressed to the nearest thousandth of a meter.
A sound wave from a police siren has an intensity of 103.1 W/m2 at a certain point; find the intensity level of the sound wave due to the ambulance?
A man in a maze makes three consecutive displacements. His first displacement is 6.00 m westward, and the second is 16.0 m northward. find the magnitude and direction of his third displacement
A block of mass, m1 is 5 kg. It is lying on a frictional horizontal surface. Evaluate the magnitude of the net force on the hanging block
The great, grey-green, greasy Zambezi River flows over Victoria Falls in south central Africa. find the velocity of the water when it hits the bottom
X-rays with a wavelength of 0.0350 nm undergo Compton scattering from a carbon target. Find the magnitude of the momentum of a scattered electron
A box is pushed a distance d along a ramp at a constant speed by a horizontal force, Fa. how much work is done by the horizontal force
A square copper plate has a circular hole in its center. Each side of the plate is 23.52 cm, and the radius of the circular hole is 7.827 cm
Calculate the number of cells in a hummingbird assuming the mass of an average cell is ten times the mass of a bacterium
A sudden gust of wind gives the boat an acceleration a, What is the boat's speed 6.4s later when the gust subsides
Estimate the fractional error (%) on the left side and on the right side of the equation based on the precision of the available equipment in class: the pulling mass is measured by slotted weights with precision of 10 gram
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