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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 13575A 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 6624WHICH 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 24090which electronic devices used at low frequencies? and high frequencies?and microwave frequencies?
2048Post New General Physics Questions
what are the Newtons principles? what is mean by gravitational force? what is mean by space technology? what is the use in space technology?
cyclotron
Difference between intrinsic and extrinsic semiconductors?
What is the direction of null vector?
Mercury is a better barometric fluid than water because?
What are the characteristics of a musical sound?
What is meant by energy spectrum of a black body? : quantum physics
how many neutrons and how many protons are present in a single deuterium nucleus?
Is the electric field constant or does it vary with time in dielectric materials?
What secondary color of light is produced by mixing the primary colors of red and blue?
Who first detected radio waves?
What is the musical sound?
A car traveling at 30mph ( =13.4 m/s) & it slams on its brakes. ( The car is decelerated by the force of the friction 0.7..f *distance x. (Weight=mg) how far will the cargo before it stops?
For two objects separated by a distance d, if the mass of one of the objects is doubled, what will happen to the gravitational attraction between them?
What do you mean by newton meter?
