Physics Lec 2 Part 1

Question 1

Si unit of pressure?

Answer 1

pascal

Question 2

formula for psi

Answer 2

lbs/in^2

Question 3

kPa at 1 atm

Answer 3

101.33

Question 4

mbar at 1 atm

Answer 4

1013.3

Question 5

mmHg at 1 atm

Answer 5

760

Question 6

cmH2O at 1 atm

Answer 6

1033.6

Question 7

psi at 1 atm

Answer 7

14.7

Question 8

how to convert bar to psi?

Answer 8

1 bar = 1 atm. 14.7psi in 1 atm.

Question 9

how to convert bar to kPa

Answer 9

1 bar = 1 atm. 101.33 kPa at 1atm.

Question 10

Describe the relationship between area, pressure, and force.

Answer 10

With increasing area, there’s decreasing pressure (force constant)

Question 11

Will a small or large syringe have more pressure (same force)?

Answer 11

small. Less surface area.

Question 12

What’s the equation for pressure?

Answer 12

P=F/a

Question 13

How many bevels does a syringe needle have?

Answer 13

3

Question 14

Given the relationship of pressure, force, and area, what does this mean regarding administering large amounts of fluids with a syringe?

Answer 14

it would be ineffective. A better choice would be a larger needle diameter (impractical) or a standard transfusion set.

Question 15

How does adjusting the APL affect the spring and valve?

Answer 15

Increasing the APL valve increases the pressure on the valve, making it more difficult for gas to escape into scavenging.

Question 16

When does the APL valve open? (related to pressure)

Answer 16

When pressure exerting downward on the valve is less than the pressure of the gas in the pressure relief valve.

Question 17

Describe the mechanics of the pressure regulator

Answer 17

Increasing the tension of the spring increases the potential internal gas pressure. When internal gas (counter force) pressure exceeds the spring force, the internal valve opens and releases gas (increasing pressure) into the regulator and equalizes the two pressures.

Question 18

Barometric pressure is also known as

Answer 18

absolute pressure

Question 19

manometric pressure is known as

Answer 19

gauge pressure

Question 20

Barometric pressure is measured against a _______

Answer 20

vacuum.

Question 21

Manometric pressure is measured against ____

Answer 21

surrounding pressure

Question 22

What is hydrostatic pressure?

Answer 22

the pressure exerted by a fluid at equilibrium against a barrier.

Question 23

when pressing the bung of a syringe, where does pressure from the internal fluid distribute

Answer 23

all directions to all parts of the system

Question 24

1 newton is equivalent to ____ gms wt

Answer 24

100

Question 25

1 gram = ________ ounces

Answer 25

0.035

Question 26

1 kg = _____ ounces

Answer 26

35 ounces

Question 27

One newton is equal to 3.5 ounces, which is the weight of which fruit?

Answer 27

apple