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
90% of the radioactive sample is left over after a time interval t. The percentage of initial sample that will disintegrate in an interval 2t is
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15th October 2017
9:13 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
What is beta decay.plz explain clearly with examples
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20th November 2017
4:51 PM
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ICSE X Physics Radioactivity
What is meant by an excited state.how can an atom come in excited state
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22nd November 2017
6:59 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
Asked by lovemaan5500
21st December 2017
4:36 PM
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ICSE X Physics Radioactivity
Does alpha beta and gamma decay take place simultaneously
What are the conditions needed for that
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21st December 2017
4:38 PM
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ICSE X Physics Radioactivity
A mass of lead is embedded in a block ofaluminium 2mm thick.radiations from a radioactive substance incident on the side of block produce aa shadow on a dlourescent screen placed beyond the block.the shadow of block of aluminium is fainter than the shadow of lead .
Give reason for the difference in detail and simple language
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23rd December 2017
7:14 AM
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CBSE XII Science Biology Environmental Issues
It has been recommended that storage of nuclear waste, after sufficient pre-treatment, should be done in suitably shielded containers buried within the rocks, about 500 m deep below the earth's surface. However, this method of disposal is meeting stiff opposition from the public. Why is this method of disposal not agreeable to many people?
Asked by sunil2791
9th February 2018
6:37 PM
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CBSE XII Science Physics
how derive a equation for average halflife of a radioactive substance?
Asked by Abhishika John
13th February 2018
4:20 PM
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ICSE X Physics
Are not beta radiations used for carbon dating Or is it surely gamma rays
Asked by lovemaan5500
17th March 2018
1:09 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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CBSE XII Science Chemistry Chemistry in Everyday Life
a human body requires .01cactivity of a radioactive substance for 24 hrs . half life of radioactive substance is 6 hours . then injection of maximum activity of radioactivity of radioactive substance can be ?
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31st May 2018
9:43 PM
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CBSE XII Science Chemistry
half life of a radioactive particle is 1 second. The rate of dissociation of A is 1000 per second . Then after 3 second , A will be ?
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31st May 2018
9:49 PM
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ICSE X Physics Radioactivity
A proton, deutron and an alpha particle having equal kinetic energies. Compare the radius of their paths when a normal magnetic field is applied
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31st August 2018
1:07 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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ICSE X Physics Radioactivity
What is the difference between alpha particles and Helium ion?
Asked by Swarnadipchatterjee9
29th December 2018
6:22 PM
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Gujarat X Physics
When does nucleus of an atom tend to be radioactive
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8th January 2019
4:26 PM
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Gujarat X Physics
When does the nucleus of an atom tend to be radioactive
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8th January 2019
4:27 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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CBSE XII Science Physics Nuclei
Radioactive elements
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22nd February 2019
11:24 PM
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CBSE XII Science Physics Nuclei
Radioactive nuclei
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23rd February 2019
7:47 PM
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ICSE X Physics Thermionic Emission and Radioactivity
Why only 'Lead' gloves are used to handle radioactive substances, and why not other metal gloves??
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3rd March 2019
12:06 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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ICSE IX Physics
What is radioactive substances? Give three examples of each radioactive element?
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20th May 2019
10:56 AM
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CBSE XII Science Physics
Solve it.
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19th November 2019
10:36 AM
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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
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10th January 2020
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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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14th January 2020
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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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14th January 2020
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NEET NEET Physics
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16th January 2020
9:53 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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CBSE X Science
what is the speed of slow moving neutron
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12th April 2020
9:27 PM
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CBSE XII Science Physics Nuclei
how are we supposed to solve this question
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17th June 2020
10:05 AM
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NEET NEET Physics Atoms and Nuclei
⭕Answer in detail, Thanks ☺️
Asked by jhajuhi19
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?
Asked by arjunsah797
16th May 2022
2:17 PM
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ICSE X Physics Radioactivity
What kind of nucleus becomes radioactive in nature
Asked by anjukumarisah730
16th March 2023
10:30 PM
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JEE Main Chemistry Atomic Structure
if bi with atomic mass number 83 number 211 and undergoes bf deay, the resultant daughter nucleus will be a) bi - 209 c) tx - 207 b) p_{0} - 211 d) pa-208
Asked by marthalamanoharreddy65
17th December 2023
10:26 AM
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