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A swimmer is distance D = 35 meter from a lightning strike in the water with I=78 kA. The water ρ=30 Ωm. The width of the swimmer along a radial line from the strike is .7 meter and his resistance across that width is 4 kΩ. Suppose that the current spreads through the water over a hemisphere centered on the strike point. Find what is the current through the swimmer?
a softball having a mass of 0.40 kg is pitched horizontally at 120kmh . by the time it reaches the plate it may have
the lowest tone to resonate in an open pipe of length l is 200 hz. which one of the following frequencies will not
One force acting on a machine part is F = ( - 5.00 N) i hat+ (4.00 N) j hat. The vector from the origin to the point where the force is applied is r = (- 0.450m) i hat + (0.150m) j hat , Calculate the torque produced by this force
A 55g horizontal metal bar, 15cm long, is free to slide up and down between two tall, vertical metal rods that are 15cm apart. What is the terminal speed at which the bar falls
for an initial velocity of 15 m/s and a launch of 55 degrees, where will the projectile strike the side of the hill
A 250 g Teddy Bear and a 5 kg baby stroller are nudged off a window sill and fall 5 meters to the ground. Determine the speeds and kinetic energies of both objects
A 60.0-kg skier with an initial speed of 12.0 m/s coasts up a 2.50-m-high rise as shown in Figure 8. Find her final speed at the top
Suppose that you'd like to find out if a distant star is moving relative to the earth. The star is much too far away to detect any change in its brightness as it moves toward or away from the earth. Instead we can use the Doppler effect to determi..
A deuteron (the nucleus of an isotope of hydrogen) has a mass of 3.34×10?27kg and a charge of 1.60×10?19C, Find the speed of the deuteron
two in-phase loudspeakers 15.0 m apart are setup in an open field to avoid reflections from objects. each speaker is
A stone with a mass of 0.900 kg is attached to one end of a string 0.900 m long. The string would break if its tension exceeds 60-N. The stone is whirled in a horizontal circle on a frictionless tabletop.
Water flows at a rate of 25 L/min through a horizontal 7.0-cm- diameter pipe under a pressure of 6.0 Pa. What is the pressure at this point
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