Pressure and Density

Question 1

pressure is?

Answer 1

a measure of how much force is acts per unit area. the smaller the area, the greater the pressure

Question 2

what is the formula for pressure?

Answer 2

pressure = force/area

Question 3

pressure unit

Answer 3

pascalss Pa or N/m^3

Question 4

why does a hydraulic system use liquid?

Answer 4

it uses a liquid because it is incompressible and transfers pressure perfectly

Question 5

density is?

Answer 5

density is the mass per unit volume in an object

Question 6

density formula

Answer 6

mass/ volume

Question 7

density is measured in?

Answer 7

g/cm^3 or kg/m^3

Question 8

if something is _____ dense than water it _____ on top of it

Answer 8

less, floats

Question 9

density of water

Answer 9

1.0g/cm^3

1000g/m^3

Question 10

the ______ _______ ________ ______ does not change when things _____

Answer 10

volume per unit area

melt

Question 11

how do you measure the density of an irregular object?

Answer 11

1) determine the mass of the object by using a balance
2) liquid is added to fill a measuring cylinder so the object would be fully submerged
3) the volume of the initial liquid (V1) is measured.
4) the object is lowered into the cylinder (being careful not to splash) and the new reading (V2) is measured.
6) the volume of the object is V2 - V1
7) the density can now be calculated.