AIIMS 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 