An ice-box is built of wood 1.75 cm thick, lined with cork 3 cm thick. If in the steady state the temperature of the inner surface of the cork is 0 ºC and that of the outer surface of wood is 12 ºC, what is the temperature of the wood-cork interface? The thermal conductivities of wood and cork are 0.2 W/m-K and 0.04 W/m-K respectively
2271The magnitude of electrostatic force between two identical positive ions that are separated by a distance of 5.0 x 10– 10 m is 3.7 x 10–9 N. (a) What is the charge of each ion? (b) How many electrons are “missing” from each ion?
2 12519A coil consisting of 200 turns of wire has its ends connected to a circuit such that the total resistance of the coil and the circuit is 2.0 ohm. There is no source of e.m.f. in the circuit. Each turn of the coil is a square of side 18 cm, and a uniform magnetic field directed perpendicular to the plane of the coil is turned on. If the field changes linearly from 0 to 0.5 T in 0.8 s, what is the magnitude of the current in the coil while the field is changing?
1 5859WHICH OF THE FOLLOWING PAIR IS INCORRECT? A) ROENTGEN: X-RAY B) NEWTON: LAW OF GRAVITATION C) FARADAY: DIFFUSION OF GASES D) PASTEUR: BACTERIOLOGY
4 12014NUMISMATICS IS THE STUDY OF A) COINS B) NUMBERS C) STAMPS D) SPACE
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9 21109which electronic devices used at low frequencies? and high frequencies?and microwave frequencies?
1624Post New General Physics Questions
What is ntu in thermodynamics?
How are amps and watts related?
Explain heat treatment. Why and how is it done?
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How do you convert from pascal to torr?
Tell me when taken to the top of a mountain, a clock will go fast or go slow or no change or stop?
Explain when are intermolecular forces the strongest?
what is use of physics in banking ? why we hire you as you are graduated in physics honours?
What is a positron?
What do you mean by newton meter?
State 'law of machines'?
What is cardiac output?
How many pounds does one gallon of water weigh?
What is loudness of sound?
Graph between frequency of photon and velocity of photo electron?
