AIIMS (All India Institute of Medical Sciences) Physics: Questions 299  304 of 500
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Question number: 299
» Experimental Skills » Speed of Sound in Air
Question
The speed of sound in a gas at S. T. P. is and the density of the gas is . Find the number of degrees of freedom of a molecule of the gas.
Choices
Choice (4)  Response  

a.  6 

b.  5 

c.  3 

d.  4 

Question number: 300
» Work, Energy and Power » Kinetic Energy
Question
Two bodies with kinetic energies in the ratio of are moving with equal linear momentum. The ratio of their masses is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 301
» Atoms and Nuclei » Half Life and Mean Life
Question
A radioactive substance decays to of its initial activity in 20 days. The halflife of the radioactive substance expressed in days is –
Choices
Choice (4)  Response  

a.  2 

b.  6 

c.  8 

d.  12 

Question number: 302
» Communication System » Sky and Space Wave Propagation
Question
For sky wave propagation of a 18 MHz signal, what should be the minimum electron density in ionosphere –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 303
» Work, Energy and Power » WorkEnergy Theorem
Question
A bullet loses of its velocity when it passes through a plank. Find the maximum number of planks through which it can pass.
Choices
Choice (4)  Response  

a.  10 

b.  5 

c.  3 

d.  9 

Question number: 304
» Kinematics » Relative Velocity
Question
A boy standing on a long rail road car throws a ball up (straight) with a velocity. The car is moving on the horizontal road with acceleration 3, How far behind the boy will the ball fall?
Choices
Choice (4)  Response  

a.  12m 

b.  8m 

c. 


d.  48 m 
