Density
what is density
how compact the molecules in an object are
What is buoyancy
an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object
In a liquid, what increases with depth
pressure
A solid ball has a mass of 150 grams and a volume of 20 cm3. What is the density?
7.5
A gas occupies 15 liters at a pressure of 40.0 mmHg. What is the volume when the pressure is increased to 60.0 mmHg?
10
What two factors influence density
mass and volume
what determines if an object sinks or floats
The difference between the buoyant force
and the object’s weight determines
whether an object sinks or floats.
To measure the volume of an irregular object what do you use
water displacement method
A platinum bar measures 5.0 cm long, 6.0 cm wide, and 1.75 cm thick, what is the volume
52.5
if a gas at 25.0 °C occupies 3 liters at a pressure of 1.00 atm, what will be its volume at a pressure of 1.50 atm?
2
what is volume
amount of space an object takes up
What is pressure
amount of force on a given area
to measure the volume of a regular object what equation do you use
L X w X h
A lead cylinder has a mass of 540 grams and a density of 2.70 g/ml. Calculate the volume of the lead cylinder.
200
A gas occupies 22.5 liters at 0.860 atm. What is the pressure if the volume becomes 15.0 L?
1.29
What happens to density if mass increases
increases
if you decrease volume what happens to pressure
increases
How much would a toy boat weigh if you put it in water and some of the water spilled out
as much as the water displaced
A sheet of metal is 12 cm wide, 1 cm tall, and 15 cm long. It was 4 grams. What is the Density?
.022
350.0 mL at 640.0 mmHg to its new volume at standard pressure
224000
Dj when volume increases what happens to density
decreases
what is atmospheric pressure
The gas molecules in the atmosphere are
pulled toward Earth due to gravity, exerting
pressure
DJ why does ice float
less dene than liquid water
A rock is placed in 10 ml of water. The water increases to 23 ml. The rock weighs 3.5 grams. What is the density of the rock?
.269
A gas occupies 6.31 liters at a pressure of 1.75 atm. Determine the volume if the pressure is increased to 1.35 atm.
8.17