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A beam (diameter 1.2 mm) from a laser pointer is bounced off a polished steel ruler with one millimetre wide divisions etched into the steel. A diffraction pattern is observed on a screen 20m away from the ruler, and the distance between the central bright fringe and the fifth dark fringe on either side is 7.32 cm. what is the wavelength of the laser pointer light?
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided. Do this on paper. Your ins..
An electromagnetic wave in a vacuum has an instantaneous magnetic field strength of 0.000000740 T at a certain point. What is the instantaneous electric field strength of the wave
A car travels at a constant velocity 30im/s for 20km, then it travels at 40im/s for the next 20km and, finally at 0im/s for the last 20km. Find the Average velocity and speed for the entire trip.
Two vectors have length V1 = 3.5 km and V2 = 4.0 km. What are the maximum and minimum magnitudes of their vector sum
A bead of mass m = 3.10 kg is released from point A and slides on the frictionless track as shown in the figure below. The height of A is ha = 6.70 m. Determine the net work done by the force of gravity in moving the bead from A to C
A student is pushing a crate up a 20 degree incline. Find the magnitude of the normal force between crate and incline
If 60.0% of the kinetic energy delivered with a 907g hammer with a speed of 7.80 m/s is transformed into heat that flows into the nail and does not flow out, what is the increase in temperature of an 8.00 g aluminium nail after it is struck 10.0 time..
The position of a 2.0 kg mass is given by x = (2t^3 - 3t^2) m, where t is in seconds. What is the net horizontal force on the mass
a nasa mission to update the electronics on a circular orbiting space station has required the work of four astronauts.
An electron with velocity v=1.0x106 m/s is sent between the plates of a capacitor where the electric field is E=500V/m. Ifthe distance the electron travels through the field is 1.0cm howfair is it deviated (Y) in its path when it emerges from the ..
If the value of the linear charge density is ? = 40.5 ?C/m and the distance between the two cables is D = 40.5 m, calculate the electric field midway between the two cables
A psychrometer gives a wet bulb and a dry bulb temperature of 19.7°C and 25°C respectively. Solving the problem without the psychrometric chart determine
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