1
JEE Main 2022 (Online) 26th June Evening Shift
+4
-1

If p is the density and $$\eta$$ is coefficient of viscosity of fluid which flows with a speed v in the pipe of diameter d, the correct formula for Reynolds number Re is :

A
$${R_e} = {{\eta d} \over {\rho v}}$$
B
$${R_e} = {{\rho v} \over {\eta d}}$$
C
$${R_e} = {{\rho vd} \over \eta }$$
D
$${R_e} = {\eta \over {\rho vd}}$$
2
JEE Main 2022 (Online) 25th June Evening Shift
+4
-1

A solid metallic cube having total surface area 24 m2 is uniformly heated. If its temperature is increased by 10$$^\circ$$C, calculate the increase in volume of the cube. (Given $$\alpha$$ = 5.0 $$\times$$ 10$$-$$4 $$^\circ$$C$$-$$1).

A
2.4 $$\times$$ 106 cm3
B
1.2 $$\times$$ 105 cm3
C
6.0 $$\times$$ 104 cm3
D
4.8 $$\times$$ 105 cm3
3
JEE Main 2022 (Online) 25th June Morning Shift
+4
-1

The terminal velocity (vt) of the spherical rain drop depends on the radius (r) of the spherical rain drop as :

A
r1/2
B
r
C
r2
D
r3
4
JEE Main 2022 (Online) 24th June Morning Shift
+4
-1

The bulk modulus of a liquid is 3 $$\times$$ 1010 Nm$$-$$2. The pressure required to reduce the volume of liquid by 2% is :

A
3 $$\times$$ 108 Nm$$-$$2
B
9 $$\times$$ 108 Nm$$-$$2
C
6 $$\times$$ 108 Nm$$-$$2
D
12 $$\times$$ 108 Nm$$-$$2
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