A metal ball of mass 2 kg moving with a speed of 36 km/hr has a head-on collision with a stationary ball of mass 3 kg. If after collision, both the balls move together, then loss in kinetic energy due to collision is
A)40 J
B)60 J
C)100 J
D)140 J

One mole of an ideal gas undergoes an isothermal change at temperature 'T' so that its volume v is doubled. T is the molar gas constant. Work done by the gas during this change is
A)RT log 4
B)RT log 2
C)RT log 1
D)RT log 3

Two particles P and Q start from origin and execute Simple Harmonic Motion along X - axis with same amplitude but with periods 3 seconds and 6 seconds respectively. The ratio of the velocities of P and Q when they meet is
A)1 : 2
B)2 : 1
C)2 : 3
D)3 : 2

If a straight line perpendicular to 2x - 3y + 7 = 0 forms a triangle with the coordinate axes whose area is 3 sq. units, then the equation of the straight line(s) is
A)3x + 2y = ± 7
B)3x + 2y = ± 6
C)3x + 2y = ± 8
D)3x + 2y = ± 4

A ray of light is incident on the surface of a slab of refractive index 1.5 and of thickness 't' so that the ray of light has angle of refraction 600, then the time taken to cross the slab will be
A)3t/c
B)3t/2c
c)2t/3c
D)4t/3c

A stretched wire of some length under a tension is vibrating with its fundamental frequency. Its length is decreased by 21%. Now its fundamental freequency :
A)increases by 50%
B)increases by 100%
C)decreases by 50%
D)decreases by 25%

Circular disc of mass 2 kg and radius 1 metre is rotating about an axis perpendicular to its plane and passing through its centre of mass with a rotational kinetic energy of 8 Joules. The angular momentum in ( J-sec ) is    
A)8    
B)4    
C)2    
D)1