A body weighs 30gm. in air, 15gm. in a liquid and 12gm. in water. Calculate the relative density of liquid.
0.8 g/cc
1.2 g/cc
0.8
1.2
Which pair of the following is a physical quantity having the same unit?
thrust and pressure
thrust and weight
force and pressure
weight and pressure
At constant temperature, the relationship between the volume (V) of a given mass of gas and its pressure (P) is
V = k P
P = kV
PV = k
V/P = k
The fact that heavy airplanes can fly through the air, best illustrates,
Pascal’s principle
Superposition
Bernoulli’s principle
Archimedes principle
What happens when altitude increases?
pressure increases
density increases
density decreases
both pressure and density increases
A 500 N weight sits on the small piston of a hydraulic machine. The small piston has area 2 cm2. If the large piston has area 40 cm2, how much weights can the large piston support?
25 N
500 N
10000 N
40000 N
Which of the following is the best statement of Pascal’s Law?
Pressure on a confined liquid is transmitted equally in all directions
A numerical arrangement where each number is the sum of the two numbers above
Two electrons cannot occupy the same quantum state at the same time
The volume of a gas is directly related to its temperature
The pressure at the surface of the ocean is 1 atm (1 x 105 Pa). At what approximate depth in the ocean water (ρ= 1025 kg/m3) would the absolute pressure be 2 atm?
1 m
10 m
100m
1000 m
Which property of the object most determines whether or not an object will float in oil?
weight
density
mass
volume
A hydraulic press allows large masses to be lifted with small forces as a result of which principle?
Pascal’s
Bernoulli’s
Archimedes’
Newton’s
