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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 13576A 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 6626WHICH OF THE FOLLOWING PAIR IS INCORRECT? A) ROENTGEN: X-RAY B) NEWTON: LAW OF GRAVITATION C) FARADAY: DIFFUSION OF GASES D) PASTEUR: BACTERIOLOGY
4 14047NUMISMATICS IS THE STUDY OF A) COINS B) NUMBERS C) STAMPS D) SPACE
Coins, Dabur, ITBPF Indo Tibetan Border Police Force, Muskan,
9 24100which electronic devices used at low frequencies? and high frequencies?and microwave frequencies?
2049Post New General Physics Questions
Explain what is an alloy?
Explain what formula is most appropriate to compute the kinetic energy of a block of ice sliding down an inclined plane?
What is the difference between the atomic theory and the kinetic theory?
What is larger the force the earth exerts on you or the force you exert on the earth?
what are the passive two-wire elements?
How echo is produced?
Tell me how we are getting light from electrical bulb?
Explain refraction?
What is the effeciency of solar cell (Current year)
When thomas edison was promoting the wide use of direct current, this personal enemy of edisons was the chief proponent and expert in alternating current?
What is meant by reflection of waves?
A truck travels 420 m. Each tire on the truck has a diameter of 42 cm. If one revolution of a tire is equal to 2? Times the radius of the tire (in meters), which of the following equations shows how many revolutions each tire makes as the distance is traveled?
What is speed of sound at sea level?
The velocity of sound in gas depends upon what?
Why ”quantum physics” is named as it is? : quantum physics
