1
JEE Main 2019 (Online) 11th January Morning Slot
+4
-1
A liquid of density $$\rho$$ is coming out of a hose pipe of radius a with horizontal speed $$\upsilon$$ and hits a mesh. 50% of the liquid passes through the mesh unaffected. 25% looses all of its momentum and 25% comes back with the same speed. The resultant pressure on the mesh will be :
A
$${3 \over 4}\rho {v^2}$$
B
$${1 \over 4}\rho {v^2}$$
C
$${1 \over 2}\rho {v^2}$$
D
$$\rho {v^2}$$
2
JEE Main 2019 (Online) 10th January Morning Slot
+4
-1
Water flows into a large tank with flat bottom at the rate of 10–4m3s–1. Water is also leaking out of a hole ofarea 1 cm2 at its bottom. If the height of the water in the tank remains steady, then this height is -
A
2.9 cm
B
5.1 cm
C
4 cm
D
1.7 cm
3
JEE Main 2019 (Online) 9th January Evening Slot
+4
-1
The top of a water tank is open to air and its water level is mainted. It is giving out 0.74 m3 water per minute through a circular opening of 2 cm radius in its wall. The depth of the center of the opening from the level of water in the tank is close to :
A
6.0 m
B
4.8 m
C
9.6 m
D
2.9 m
4
JEE Main 2018 (Online) 16th April Morning Slot
+4
-1
A small soap bubble of radius 4 cm is trapped inside another bubble of radius 6 cm without any contact. Let P2 be the pressure inside the inner bubble and P0, the pressure outside the outer bubble. Radius of another bubble with pressure difference P2 $$-$$ P0 between its inside and outside would be :
A
12 cm
B
2.4 cm
C
6 cm
D
4.8 cm
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