Pressure Units and Conversion Techniques

Mr. Millings explains the concept of pressure as the ratio of force to area and provides examples of pressure in everyday situations. He introduces various units of pressure measurement, including atmospheres, millimeters of mercury, torr, kilopascals, and psi. The video includes several conversion examples, demonstrating how to convert between these units using equivalent statements and calculations.

What is the definition of pressure?

• The ratio of force to the area over which that force is distributed

• The weight of an object divided by its volume

• The ratio of area to force

• The amount of force exerted by an object

Which of the following is NOT an example of pressure being exerted?

• A Marine doing push-ups

• A girl blowing up a balloon

• Air inside a tire

• A car moving at a constant speed

Which unit is NOT used to measure pressure?

• Torrs

• Millimeters of mercury

• Atmospheres (ATMs)

• Liters

Who is the unit 'torr' named after?

• Isaac Newton

• Evangelista Torricelli

• Albert Einstein

• Galileo Galilei

How many torrs are equivalent to 2.5 atmospheres?

• 1900

• 760

• 1000

• 190

If you have 1100 torrs of pressure, how many psi is this equivalent to?

• 760

• 14.69

• 21.262

• 101.3

Convert 350 kilopascals to atmospheres.

• 101.3

• 14.69

• 0.526

• 3.45

How many atmospheres are equivalent to 400 millimeters of mercury?

• 0.526

• 3.45

• 14.69

• 101.3

Convert 40 psi to kilopascals.

• 40

• 101.3

• 14.69

• 276.8

Which of the following is the correct conversion factor for psi to kilopascals?

• 1 psi = 14.69 kPa

• 1 psi = 101.3 kPa

• 1 psi = 760 kPa

• 1 psi = 6.89476 kPa