Options:
- A. 3.74 x 109 disintegration per sec
- B. 3.70 x 1010 disintegration per sec
- C. 3.55 x 1010 disintegration per sec
- D. 3.60 x 1010 disintegration per sec
View Answer
B. 3.70 x 1010 disintegration per sec
Physics
Strontium-90 is used as __________________?
Options:
- A. ?-particle source
- B. ?-particle source
- C. ?-rays source
- D. Neutron source
View Answer
A. ?-particle source
A body in equilibrium__________________?
Options:
- A. Always at rest
- B. Always in uniform motion
- C. May be at rest or in uniform motion
- D. May be at rest or in motion
View Answer
C. May be at rest or in uniform motion
Mass defect per nucleon is ___________________?
Options:
- A. The binding energy of the nucleus
- B. Packing fraction
- C. The average energy of the nucleus
- D. All of above are one and the same thing
View Answer
B. Packing fraction
A body will be in complete equilibrium when it is satisfying______________?
Options:
- A. 1st condition of equilibrium
- B. 2nd condition of equilibrium
- C. Both Ist and 2nd condition of equilibrium
- D. Impossible
View Answer
C. Both Ist and 2nd condition of equilibrium
The bombardment of nitrogen with alpha particles will produce______________?
Options:
- A. Neutron
- B. Proton
- C. Electron
- D. Positron
View Answer
B. Proton
Which one is not a type of dynamic equilibrium ?
Options:
- A. Rotational equilibrium
- B. Translational equilibrium
- C. Static equilibrium
- D. Both A and C are corret answer
View Answer
C. Static equilibrium
The diameter of an atom is approximately_______________?
Options:
- A. 10-12m
- B. 10-11m
- C. 10-10m
- D. 10-14m
View Answer
C. 10-10m
According to which one of following law the density of atom is uniform ?
Options:
- A. J.J.Thomson model
- B. Rutherfords model
- C. Bohrs model
- D. All of the above laws contradict the statement
View Answer
A. J.J.Thomson model
Radioactive decay obeys which one of the following law ?
Options:
- A. N=Noe-?t
- B. N=Noe?t
- C. N=Noe-?t/2
- D. No=N(1+e?t)
View Answer
A. N=Noe-?t