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
2284The 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 12556A 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 5884WHICH OF THE FOLLOWING PAIR IS INCORRECT? A) ROENTGEN: X-RAY B) NEWTON: LAW OF GRAVITATION C) FARADAY: DIFFUSION OF GASES D) PASTEUR: BACTERIOLOGY
4 12116NUMISMATICS IS THE STUDY OF A) COINS B) NUMBERS C) STAMPS D) SPACE
Coins, Dabur, ITBPF Indo Tibetan Border Police Force, Muskan,
9 21231which electronic devices used at low frequencies? and high frequencies?and microwave frequencies?
1634Post New General Physics Questions
Can i work 240 volt 1400 watts 1 ton ac with 24 volt battery..! How..?
Explain what does hull speed mean?
How can you save the sea from oil and sound polution?
Which properties of waves are independent of each other?
What is photometry?
What are the characteristics of black body? : quantum physics
i want to increase my ups back time ,i have added one 12v 68ah battery to my ups but it is not working ,is it possible to make adjustment so that new battery will work.
Explain how do fireworks turn into shapes like hearts and stars?
Explain when are intermolecular forces the strongest?
When an object moves with constant velocity does its average velocity during any time interval differ from its instantaneous velocity at any instant?
Explain the difference between isolation transformers and step up or step down transformer?
I just want to convert the voltage into current i.e. suppose I have 750V & 1A AC power then I want to convert it into 12V & 62A DC power only difficulty is that I don't want to use the tranceformer. Simply to say, I want to make the step-down without using tranceformer. Please, give me some ideas. And also I want the relation between Magnetic Induction & Weight of the body can be levitated. Or I can say, how much of magnetic induction requires to lift 500gms weight? I am heartily thankful to you.
What is a galvanometer and its use?
Laser is an acronym for what?
Which particles/ rays do radioactive substances emit?
