A metal pipe 3 metre long was found to weigh 7.6kg. What would be the weight of the same kind of 7.8m long pipe?
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On the surface of the moon, the (a) mass and weight become lesser (b) mass remains constant and only the weight is lesser
(b) mass remains constant and only the weight is lesser
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Are there people like Lencho in the real world? What kind of a person would you say he is?
I don't think there can be any such people in the real world. Lencho is literate and yet he writes a letter to God and even posts it without writing...
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Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
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A long solenoid has 1000 turns per metre and carries a current of 1 A. It has a soft iron core of μr = 1000.
(a), (d) (a) The H field in the solenoid is (nearly) unchanged but the B field decreases drastically. (d) The magnetisation in the core diminishes by a factor of about 108.
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Consider a metallic pipe with an inner radius of 1 cm. If a cylindrical bar magnet of radius 0.8cm is dropped through the pipe,
For the magnet, eddy currents are produced in the metallic pipe. These currents will oppose the motion of the magnet. Therefore magnet’s downward acceleration will be less than the acceleration...
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A merchant has 120 litres of oil of one kind, 180 litres of another kind and 240 litres of a third kind.
60 L capacity of such a tin.
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A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a source of
3rd harmonic [since no=v/4 l=412.5 with v = 330 m/s]
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The shadow of a 3m long stick is 4m long. At the same time of the day,
The correct answer is 18m
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Where will a body weigh more at Delhi or at Shimla? Why?
A body will weigh more at Delhi because at higher altitudes the value of g decreases.
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Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
(iv) BaCO3 Thermal stability of metal carbonates increases as the electropositive character of the metal or the basicity of the metal hydroxide increases from Be(OH)2 to Ba(OH)2. Thus, BaCO3 is the most stable.
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