Density and Pressure

Question 1

What is the formula for density?

what is the symbol for density?

Answer 1

Density = Mass/Volume

roh

Question 2

What is density?

Answer 2

An object or substances mass per unit volume

Question 3

What unit of measurement is used for density?

Answer 3

kg/m3 OR g/cm3

Question 4

What unit of measurement is used for mass?

Answer 4

kg

Question 5

What unit of measurement is used for volume?

Answer 5

m3

Question 6

How do you measure the mass of a regular solid?

Answer 6

measure using a weighing scale/ mass balance.

Question 7

How do you measure the volume of a regular solid?

Answer 7

L x W x H (measure with ruler)

Question 8

How do you measure the mass of an irregular solid?

Answer 8

measure using a weighing scale or mass balance

Question 9

How do you measure the volume of an irregular solid?

Answer 9

In a measuring cylinder/eureka can, add water and measure the water’s volume. Add the object and measure its new volume. The difference in volume is the volume of the object.

Question 10

When is a eureka/displacement can used?

Answer 10

when measuring the density of large irregular solids (rocks)

Question 11

When is a measuring cylinder used?

Answer 11

when measuring the volume of a small irregular solid

Question 12

How do you measure the mass of a liquid?

Answer 12

measure mass of container, then add liquid and measure new mass. The difference between the two is the mass of the liquid

Question 13

How do you measure the volume of a liquid?

Answer 13

use a measuring cylinder to measure volume

read the value at eye level, on a flat surface, from bottom of miniscus

Question 14

What is 1kg in g

Answer 14

1000g

Question 15

What is 1m in cm

Answer 15

100cm

Question 16

what is 1m/100cm in mm

Answer 16

1000

Question 17

What is 1 g/cm3 equal to in kg/m3

Answer 17

1,000,000 kg/m3

Question 18

Density is how much ________ there is in 1cm3 of a material.

Answer 18

mass

Question 19

A material with a high density is ________ than a material with a low density of the same volume

Answer 19

heavier

Question 20

Materials with a ________ density than the liquid will float in it

Answer 20

lower

Question 21

Will heavier objects exert more or less pressure if the area of contact is small?

Answer 21

more pressure

Question 22

What happens to pressure when area increases?

increase or decrease, explain why and give example

Answer 22

it decreases because the weight (force) is distributed over a larger surface. E.g. snowshoes

Question 23

If the weight of an object increases, and the area over which the weight is distributed stays the same, what happens to pressure?

Answer 23

the pressure increases

Question 24

If the weight stays the same but the area increases, the pressure will be spread out over a larger area, thus making pressure ______.

Answer 24

decrease

Question 25

do high heels have high pressure? explain why

Answer 25

The heel of high heels has a small surface area, so it exerts high pressure on the ground

Question 26

What is pressure?

Answer 26

force in a given area.

Question 27

What is the formula for pressure?

Answer 27

Pressure = Force/Area

Question 28

What is the unit of measurement for pressure?

Answer 28

pascal (Pa) OR if area is in cm2, pressure will be N/cm2

Question 29

What is the unit of measurement for force?

Answer 29

N(ewtons)

Question 30

What is the unit of measurement for area?

Answer 30

m2

Question 31

What is the formula for pressure difference?

Answer 31

Pressure difference = density of liquid x gravitational field strength x height P = roh(density) x g x h

Question 32

What is the formula to calculate orbital speed?

Answer 32

2 x pi x orbital radius / time period

Question 33

What is the formula for weight, mass and g

Answer 33

w = m x g

Question 34

whats the unit for gravitational field strength?

Answer 34

N/kg