Related Questions

The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
নিম্নের বিক্রিয়ায় কোনটি Y? 2412Mg →emit one β-rayX →emit one σ-rayY
A 2713AI
B 2311AI
C 2413AI
D 2011AI
240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
Out of the following, which is not emitted by radioactive substance?
A Electrons
B Electromagnetic radiations
C Alpha particles
D Neutrons
Emission of β-particles during radioactive decay of a substance is from
A Innermost shell
B Nucleus
C Outermost shell
D None of these
যদি কোন তাপ ইঞ্জিন হতে কোন তাপ নির্গত না হয় তবে ইঞ্জিনের দক্ষতা কত হবে? (What will be the efficiency of a heat engine, if it does not emit any heat?)
A 0%
B 50%
C 75%
D 100%
Why does'nt the hydrogen atom emit X-rays?
A It is very small in size
B It has only one electron
C Its energy levels are very close to each other
D it is highly electropositive
Choose the lettered word or phrase that is most nearly opposite in meaning to the word in capital letters. EMIT :
A Absord
B demand
C mistake
D prevent
Geysers have often been compared to volcanoes _______ they both emit hot liquid from below the Earth's surface.
A due to
B because
C in spite of
D regardless of
The meaning of the word 'Emit'?
A to discharge
B to render
C to turn into
D to escape

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