Pressure

Question 1

Equation of

Pressure

Answer 1

P = F/A

Force / area

Question 2

Equal to?

1 Pa

Answer 2

1 N/m^2

Question 3

Define and give the unit

Pressure

Answer 3

force acting on each unit of surface area

Measured in Pa or N/m^2

Question 4

A fizzy drink produces a force of 25 N on the base of a bottle of area 0.005 m2. What is the pressure produced by the drink?

Answer 4

5 kPa

Question 5

How will an object with a higher surface area differ with one with a lower surface area in terms of pressure

(Assuming constant force in the two object)

Answer 5

It will have a lower pressure compared to another object with a lower surface area

Question 6

Equation for:

Δpressure in liquids

Answer 6

Δp = Δhρg

ΔPressure = Δ depth * Gravitational field strength * density

Question 7

A submarine descends from the surface to a depth of 1000 m in seawater of density 1030 kg/m3. What is the pressure due to the seawater at this point? (Assume g = 10 N/kg.)

Answer 7

(10.3 MPa

Question 8

Factors to increase pressure

Answer 8

Increase force or dwindle the surface area

Question 9

Factors to decrease pressure

Answer 9

Decreasse force or enlarge surface area