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CBSE Class 11-science Answered

removing scotch tape in a vaccum medium produces X-rays how?
Asked by Zain | 05 May, 2012, 12:33: PM
answered-by-expert Expert Answer
In 1953, Russian scientists showed that triboluminescence caused by peeling a roll of an unidentified Scotch brand tape in a vacuum can produce X-rays . In 2008, American scientists performed an experiment that showed the rays can be strong enough to leave an X-ray image of a finger on photographic paper
Answered by | 07 May, 2012, 11:53: AM

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CBSE 11-science - Physics
The second overtone of a pipe closed at one end has the same frequency as the third overtone of a pipe open at both ends. Compare the length of the pipes
Asked by emad.amd | 21 Mar, 2024, 12:00: PM
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CBSE 11-science - Physics
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Asked by sherry.sharma771 | 08 Feb, 2023, 08:25: AM
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CBSE 11-science - Physics
Please refer to the uploaded image for the doubt. [In the image, length of the open pipe=0..6m] // *SORRY FOR BAD QUALITY* //
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Asked by arjunsah797 | 17 May, 2022, 01:19: PM
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CBSE 11-science - Physics
how to prove that the frequencies produced in the string are in the ratio 1:2:3
Asked by lakshmiks703 | 17 Apr, 2022, 07:23: PM
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CBSE 11-science - Physics
The frequency is directly proportional to length multiplied by tension and mass in the length of string .derive the formula of frequency
Asked by Umeshlochab80 | 12 May, 2021, 09:24: PM
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CBSE 11-science - Physics
The velocity of the wave in of sound depends on bulk modulus and density of the medium derive the formula of velocity
Asked by umeshlochab887 | 12 May, 2021, 06:17: PM
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CBSE 11-science - Physics
show that in the case of closed organ pipe, the ratio of the frequencies of the harmonics is 1:3:5:7.​
Asked by ks076345 | 22 Mar, 2021, 09:20: AM
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CBSE 11-science - Physics
A photograph of a house occupied an area of 1.75 sq.cm on a 35mm slide.The slide is projected on to a screen and the area of the house on the screen is 1.55 sq.m.What is the linear magnification of the projector-screen system?
Asked by pb_ckt | 22 May, 2019, 10:19: AM
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CBSE 11-science - Physics
Pls solve.
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Asked by pb_ckt | 21 May, 2019, 02:59: PM
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CBSE 11-science - Physics
The diameter of an iron wire is 1.20mm. If the speed of the transverse wave in the wire be 50.0m/s , what is the tension in the wire ? The density of iron os 7.7 × 10 raise to 3 k/ m cube
Asked by drbharatkaila | 13 Feb, 2019, 07:38: PM
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