Pressure 2

Which of the following instruments is used to measure atmospheric pressure

• barometer

• manometer

• sphygmamometer

• thermometer

Gauge Pressure is the difference between air and gas pressure

• False

• True

The air pushes equally on both sides so, gauge pressure is zero

• True

• False

The pressure inside the toy is

• more than the air pressure

• less than the air pressure

• equal to the air pressure

• equal to the gauge pressure

The height difference (here in the picture) between the levels of the u tube manometer is equal to the

• atmospheric pressure

• the difference between air pressure and gas pressure

• none

• gas pressure

What is the pressure of trapped gas

• 76 cm of Hg

• (76-10) cm of Hg

• (76+10) cm of Hg

• 10 cm of Hg

Boyles law states that if temperature is constant pressure decreases if volume

The greatest ocean depths on the Earth are found in the Marianas Trench near the Philippines. Calculate the pressure due to the ocean at the bottom of this trench, given its depth is 11.0 km and assuming the density of seawater is constant all the way down. 1200 kg/m^3

• 1200x10x11

• 1200x11

• 1200x11000x10

• 1200x10

In a dive high pressure breathing equipment are used to normalize pressure

because deep under water, water pressure pushes lungs inwards, to compensate that

• True

• False

Use boyles law

A diver has a lung volume of 0.006 m^3 of air at sea level where air pressure is 100 kPa. What is the diver's lung volume at 10 m depth where pressure is 200 kPa.

• 0.003 m^3

• 0.012 m^3

• 100 m^3