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The average resistivity of the human body is 5 ohm*m. The conducting path between two hands is approximated as a cylinder with length 1.6m and diameter 0.1 m. Skin resistance is negligible.
a) what is the resistance between the hands?
b) what potential difference between the hands is needed for a lethal current of 100 mA?
c) what power is dissipated in the body from the current in b?
A ball is thrown upward from the ground with an initial speed of 23.90 m/s; at = same instant, a ball is dropped from a building 16 m high. After how long will the balls be at the same height.
The component of the external magnetic field along the central axis of a 50-turn coil of radius 5.6 cm increases from 0 T to 1.8 T in 3.6 s, what is the magnitude of the induced current in the coil
A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. What is the index of refraction of the unknown liquid
A thin film of oil (n = 1.10) is located on smooth, wet pavement. When viewed from a direction perpendicular to the pavement, What is the minimum thickness of the oil film?
a heavy but uniform rope of length l is suspended from a ceiling .a particle is dropped from the ceiling at the instant when the bottom end is given the jerk. where will the particle meet the pulse
Objective questions based on work, energy, power.
q1. a disk with radius 0.5 m is oriented with its normal unit vector n at an angle of 30deg to a uniform electric field
A 0.200 kg block is placed on a vertical spring (k = 5.00x10^3) and pushed downward, compressing the spring 0.100 m. As the block is free, it leaves the spring and continues to travel upward. What height above the point of release would block reac..
A particle moves along the x-axis according to the equation x(t) = 2.0 + 3.0t2 - 1.0t3, where x is in meters and t is in seconds. What is the position of this particle when it achieves its maximum speed in the positive x-direction? What is its spe..
Two points in a rectangular coordinate system have the coordinates (4.7, 2.5) and (-2.5, 4.7), Determine the distance between these points
en boxes, each 21.0 cm high and weighing 235 N, initially are all side by side on the floor. Compute the power necessary to stack the boxes
A 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C?
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