6
MCQ (Multiple Correct Answer)
For a surface molecule,
A
the net force on it is zero
B
there is a net downward force
C
the potential energy is less than that of a molecule inside
D
the potential energy is more than that of a molecule inside
7
MCQ (Multiple Correct Answer)
Pressure is a scalar quantity, because
A
it is the ratio of force to area and both force and area are vectors
B
it is the ratio of the magnitude of the force to area
C
it is the ratio of the component of the force normal to the area
D
it does not depend on the size of the area chosen
8
MCQ (Multiple Correct Answer)
A wooden block with a coin placed on its top, floats in water as shown in figure.
The distance $l$ and $h$ are shown in the figure. After sometime, the coin falls into the water. Then,
A
$l$ decreases
B
$h$ decreases
C
$l$ increases
D
$h$ increases
9
MCQ (Multiple Correct Answer)
With increase in temperature, the viscosity of
A
gases decreases
B
liquids increases
C
gases increases
D
liquids decreases
10
MCQ (Multiple Correct Answer)
Streamline flow is more likely for liquids with
A
high density
B
high viscosity
C
low density
D
low viscosity