The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'P', the fractional decrease in radius is
A
$${B \over {3p}}$$
B
$${{3p} \over B}$$
C
$${p \over {3B}}$$
D
$${p \over B}$$
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Preeti reached the metro station and found that the escalator was not working. She walked up the sationary escalator in time t1. On another days, if she remains stationary on the the moving escalator, then the escalator takes her up in time t2. The time taken by her to walk up on the moving escalator will be
A
$${{{t_1}{t_2}} \over {{t_2} - {t_1}}}$$
B
$${{{t_1}{t_2}} \over {{t_2} + {t_1}}}$$
C
$${{t_1} - {t_2}}$$
D
$${{{t_1} + {t_2}} \over 2}$$
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
The x and y coordinates of the particle at any time are x = 5t $$-$$ 2t2 and y = 10t respectively, where x and y are in metres and t in seconds. The acceleration of the particle at t = 2 s is
