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High voltage power lines are a familiar sight throughout the country. The aluminum wire used for some of these lines has across-sectional area of 4.90 x 10-4 m2. Find the resistance of ten kilometers of this wire?
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A certain loudspeaker system emits sound isotropically with a frequency of 2270 Hz and an intensity of 1.05 mW/m2 at a distance of 5.26 m. Assume that there are no reflections
A certain light source is found to emit radiation whose peakvalue has a frequency of 1.00E15 Hz. Find the temperature of the source assuming that is a blackbody radiator
you drive due east at 85km/h for 50min. then you follow a road going 60 degrees south of east, going 90km/h for another 30min. Find your total displacement
The cohesive energy of a sodium chloride crystal is 6eV per ion pair, Neglecting the energy of repulsion, estimate the interionic spacing
When a spring cannon is horizontal, above the ground by 0.83m. by what factor would you expect the range to change
A luminous point is moving at speed Vo toward a spherical mirror of radius R along its axis. What is the speed at which the image is moving
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 62.9 N, Jill pulls with 87.7 N in the northeast direction, What is the direction of the net force
An air-core solenoid is attached to a 6 V battery via a switch. The switch is closed, what is the resistance and inductance of the coil
A diver of mass 60kg, on entering the water with an initial velocity of 14.87ms-1, experienced a force of resistance due to the opposing motion of magnitude of 180v Newtons, Calculate the maximum depth, in metres the diver will submerge
For the following diagram. , Y = 36 cm, X = 30 cm, Z (the distance from the Y axis to the center of the circle) equals 12 cm and the diameter of the circle is 16 cm. Circle is negative area. The distance from the x axis to the center of the circle..
Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is negligible, What is the current in the rod
Starting form rest, a 5.00 kilogram block slides 2.50 meter down an incline of 30.0o. The coefficient of kinetic friction between the incline and the block is 0.436. Calculate the work done on the block by the normal force
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