Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
If one does not take into account the surface resistance of the skin, the averageresistivity of the human body is about 5Ω⋅m . The conducting path between the handsstretched out can be approximated as a 1.6m long cylinder with the diameter of 0.1m. (a)What is the resistance of this conductor? (As a side note, the resistance of the skin isconsiderably larger for dry skin than for wet skin, so one could imagine a worst-casescenario in which the skin resistance was lowered to a negligible value by wetting theskin with salt water. This, of course, should never be done when operating electricaldevices! The resistance of very dry skin can be as high as 500kΩ, whereas that of wetskin can be as low as 1kΩ).
(a) What is the resistance of this conductor?
(b) What voltage between the hands would correspond to a lethal shock current of 100mA?
(c) What power is dissipated through the body?
(d) If the resistance between the hands isincreased to 10kΩ and a person accidentally grasps the terminals of a 14kV power supplywith an internal resistance of 2kΩ, what is the current through the person's body? Draw acircuit representing the situation prior to writing down the appropriate equation andsolving for the current. What is the power dissipated in the person's body?
(e) Could thepower supply be made safe and how would that be accomplished? One could require amaximum unharmful current of 1mA.
A 50 foot garden hose isfilled with sea water. What is the resistance from one end to the other, what is the current density in the hose
A small immersion heater is rated at 352 W. Estimate how long it will take to heat a cup of soup (suppose this is 250 mL of water) from 20°C to 50°C.
Suppose this rod can expand in sections like an umbrella shaft. Calculate the final angular speed if it expands in a totaly length of 2.0 m while rotating, assuming its angular momentum is conserved
A system consists of 2.6 mol of an ideal monatomic gas at 375 K. How much heat should be added to the system to quadruple its internal energy at constant pressure? How much heat should be added to the system to quadruple its internal energy at consta..
A farmer measures the distance around a rectangular field. The length of each long side of the rectangle is found to be 29.59 m, What is the total distance around the field
A 1.8 book is lying on a 0.70 -high table. You pick it up and place it on a bookshelf 2.3 above the floor. How much work does gravity do on the book
Two wires are anchored at both ends. Wire 1 has a mass of 147 gram and a length of 9.2 meter. Determine what must be the tension in Wire 1 if its third harmonic is to equal the first overtone of Wire 2
You are given 10 identical springs. Describe how you would develop a scale of force (i.e., a means of producing repeatable forces of a variety of sizes) using these springs
A0.26-kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff, the rock has a speed of 29 m/s.
When you touch a friend after walking across a rug on a dry day, you typically draw a spark of about 2 mm. Estimate the potential diference between you and your friend before the spark
a mass m is attached to a string of length l and released when the string is horizontal, causing the mass to fall in a circular path. determine the maximum value of the tension force in the string
Two small metal spheres with masses 2 gram and 4 gram are tied together by a 4.6 centimeter long mass less string and are at rest on a frictionless surface. Compute what is the energy of this system
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd