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You watch a distant carpenter driving his nails into the side of a house at a regular rate of 1 stroke per second. You hear the sound of the blows exactly synchronized with the blows you see. You then hear one more blow after you see him stop hammering. How far away is he? Justify your ANSWER---BE BRIEF.
Solution1 : The information tells you that sound travels for one second before reaching you the actual distance will depend on temperature, since the speed of sound varies with temperature, at 20 deg C it is approx 343m/s, so if this is a nice spring day, you are 343m away
A helicopter is ascending vertically with a constant speed of 6 meters per second relative to the ground. At the immediate the helicopter is 60 meters above the ground it rele
A copper rod which is 1 centimetre in diameter carries a current of 5 amps. The current is distributed uniformly throughout the rod. The magnetic field half way between the axis
An ice-skater with a mass of 75.0 kg pushes off against a second skater with a mass of 42.0 kg. Both skaters are initially at rest. After the push, the larger skater moves
In a vacuum tube, electrons accelerate from the cathode element to the plate element, which is maintained at a positive potential with respect to the cathode. If the plate voltage
A 10L helium balloon at a pressure of 2 bar at 27C. some O 2 is now in balloon and final volume is made 30L. the pressure also fell to 1 bar at same temperature. the partial press
maximum 20 mA current can flow through a zener diode.if zener voltage 6V how much resistance will have to be applied in series with the zener diode for 9V supply? calculate load cu
give a example
The weightless simply supported beam below has a VDL of P61kN/m, a point load of P62 kN and a UDL of P63 kN/m as shown. Determine the vertical reaction force at A the maximum bend
In an electric field difference among potential energy of two points A and B is described as equal to the amount of work done (by external agent) in moving a unit positive charge f
newton; N (after Sir I. Newton, 1642-1727) The derived SI unit of force, explained as the force needed to give a mass of 1 kg an acceleration of 1 m/s 2 ; thus it has units of
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