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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
2679The 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 13578A 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 6628WHICH OF THE FOLLOWING PAIR IS INCORRECT? A) ROENTGEN: X-RAY B) NEWTON: LAW OF GRAVITATION C) FARADAY: DIFFUSION OF GASES D) PASTEUR: BACTERIOLOGY
4 14055NUMISMATICS IS THE STUDY OF A) COINS B) NUMBERS C) STAMPS D) SPACE
Coins, Dabur, ITBPF Indo Tibetan Border Police Force, Muskan,
9 24111which electronic devices used at low frequencies? and high frequencies?and microwave frequencies?
2051Post New General Physics Questions
Explain how does the elevation and air pressure affect the boiling point of water?
What is radium used for?
Explain diffraction?
why sink condition occur in vivo.???
In which medium does the sound travel fatest?
What path does an asteroid take?
Does weight affect how far you jump?
Physicists most commonly call a mass moving in a straight line path as having:
Tell me how are amps and watts related?
What is speed of sound at sea level?
what is momentum?
Explain the characteristics of dead stars?
Does a soccer ball go faster in the air on a cold or hot day?
Order the following categories of electromagnetic radiation from the lowest frequency to the highest? Fm radio, uhf tv, am radio, microwaves
How is radiocarbon produced in the atmosphere?
