AIEEE Exam

Substance A has a specific heat that is about 3.4
times that of substance B. A cube of A and a
cube of B, both of equal mass and at 20ºC, are
placed in two different Styrofoam cups, each
filled with 100g of water at 40ºC. The Styrofoam
cups have negligible heat capacities. After
equilibrium has been attained -
(A) The temperature of the B is lower than that
of the A
(B) The temperature of the B is higher than that
of the A
(C) The temperature of water in the two cups are
same
(D) (A) or (B) depending on how much mass is
involved

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AIEEE Other Question
The sound level of the chirping made by a bird at
a distance of 5 metres is measured is 30 dB.
When the same bird is 50 metres away, the
sound level is measured at 10 dB. How many
times is the amplitude of the sound wave at
5 metres away compared to 50 metres away -
(A) 3 times greater (B) 10 times greater
(C) 20 times greater (D) 100 times greater A particle of mass m, initially at rest, is acted
upon by a variable force F for a brief interval of
time T. It begins to move with a velocity 'u' after
the force stops acting. F is shown in the graph as
a function of time. The curve is a semicircle,
then