JEE Plances JEE (Main) Physics Nuclear Physics and Radioactivity
FREE URANIUM(238) NUCLIE KEPT IN A TRAIN EMITS ALPHA PARTICLES.WHEN THE TRAIN IS STAIONARY AND A URANIUM NUCLEUS NUCLEUS DECAYS A PAASENGER MEASURES THAT THE SEPERATION BETWEEN THE ALPHA PARTICLE AND THE RECOILING NUCLEUS BECOME X IN THE TIME T AFTER THE DECAY .IF THE DECAY TAKE PLACE WHEN THE TRAIN IS MOVING AT UNIFORM SPEED AUNIFORM SPEED V THE DISTANCE BETWEEN THE ALPHA PARTICLE AND THE RECOIOLING NUCLEUS AT A TIME T AFTER THE DECAY AS MEASURED BY THE PASSENGER WILL BE-
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15th October 2017
4:25 PM
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JEE Plances JEE (Main) Physics Nuclear Physics and Radioactivity
Two identical sample P and Q of radioactive substance having mean life T are observed to having are observed to have activities Ap and Aq respectively at the time of observation if P is older than Q then the difference in their ages is
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15th October 2017
9:21 PM
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JEE Plances JEE (Main) Physics Nuclear Physics and Radioactivity
The radioactivity of an old sample of a liquid due to tritium half life 12.5years was found to be only about 3% of that measured in a recently purchased bottle marked 7years old .the sample must have been prepared about
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15th October 2017
9:25 PM
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ICSE X Physics Radioactivity
Is only the nucleus of atom involved in radiioactive decay
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22nd November 2017
7:02 AM
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CBSE XII Science Physics Nuclei
Differentiate between alpha,beta and gamma decay.
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4th December 2017
9:22 AM
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ICSE X Physics Radioactivity
In alpha decay 2 protons and two neutrons are lost by an atom
Does the number of elcetrons reamin same
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21st December 2017
4:36 PM
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CBSE X Physics
The half-life of a radioactive nuclei is 3 hours. In 9 hours its mass will be reduced by a factor of :- a.) 1/9 b.)1/27 c.) 7/8 d.)1/6 GIVE WITH PROPER STEPS
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7th May 2018
10:12 PM
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JEE Plances JEE (Main) Physics
half life of a radioactive substance is 4 hours. After 20 hours, what is the fractional value of the substance left undecayed?
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23rd October 2018
10:50 PM
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CBSE XII Science Physics Nuclei
figure for 13.6 in chapter nuclei
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16th November 2018
11:14 AM
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ICSE X Physics Radioactivity
What is the difference between alpha particles and Helium ion?
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29th December 2018
6:22 PM
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ICSE X Physics Radioactivity
State whether(a) atomic number,and (b) mass number are conserved in a radioactive beta decay..
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3rd February 2019
10:25 AM
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ICSE X Physics Radioactivity
What precautions should be taken while holding radioactive substances ? Why copper cannot beused as a fuse wire ?
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6th February 2019
7:19 PM
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NEET NEET Physics
Please answer the following question with explanation
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19th February 2019
10:46 PM
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ICSE X Physics Radioactivity
Define radioactive decay [2 mark]
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3rd March 2019
7:45 PM
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CBSE XI Science Chemistry
In 12.4 hours, a 100 gram sample of an element decays so that its mass is 25 grams. grams. What is the approximate half-life of this radioactive substance?
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30th March 2019
10:31 AM
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NEET NEET Physics
15mg of radioactive sample 90% disintergrate in 4years,99.9% disintegration will be in?
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26th April 2019
7:01 PM
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CBSE XII Science Physics
Tick the answer
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29th April 2019
6:26 PM
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CBSE XII Science Physics
Solve it.
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19th November 2019
10:36 AM
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CBSE XII Science Physics Nuclei
Carbon-14(C14) decays at a constant rate in such a way that it reduces to 50% in 5568 years. Find the age of an old wooden piece in which the carbon is only 25% of the original.
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1st December 2019
10:03 AM
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CBSE XII Science Maths Differential Equations
12th sum plz
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16th December 2019
9:36 PM
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NEET NEET Physics
please answer this
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10th January 2020
10:06 PM
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NEET NEET Physics
please answer this
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10th January 2020
10:07 PM
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NEET NEET Physics
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11th January 2020
9:45 PM
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NEET NEET Physics
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11th January 2020
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NEET NEET Physics
please answer this
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14th January 2020
10:10 PM
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NEET NEET Physics
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14th January 2020
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NEET NEET Physics
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15th January 2020
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NEET NEET Physics
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16th January 2020
9:55 PM
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NEET NEET Physics
please answer following
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31st January 2020
10:25 PM
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JEE Main Chemistry Atomic Structure
Pl give an easy solution..pl experts
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4th February 2020
6:41 PM
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NEET NEET Physics
A→→C(Half life=1 minute), B→→C(Half life=2minutes). At t=0, concentration of A was 4N｡ whereas concentration of B was N｡ at t=0. Find- (i) the concentration of C at the instance when concentration of A and B becomes equal. Also find(ii) the concentration of C at the instance when activity of A becomes equal to activity of B.
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30th March 2020
8:02 PM
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NEET NEET Physics
⭕ Answer is option d , plz explain....thanq🙂
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23rd April 2020
1:55 PM
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NEET NEET Physics Atoms and Nuclei
⭕Answer in detail, Thanks ☺️
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30th August 2021
8:02 PM
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CBSE XII Science Physics Nuclei
55Cs124(Z=55,A=124) has a half life of 30.8s. (a) If we have 7.8 microgram initially, how many nuclei are presents? How many are present 2 min later? (b) What is the activity at this time? (c) After how much time will the activity drop to less than about 1 per second?
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16th May 2022
2:17 PM
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JEE Main Physics Atoms and Nuclei
if Bi with a mass number 211 and atomic number 83 undergoes beta decay the resultant daughter nuclei will be
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31st March 2024
2:13 PM
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