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AP Physics 1
Unit 8: Fluids
8.1 Density and Pressure
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In the density formula, ρ (rho) represents
density
Density affects
buoyancy
and fluid dynamics.
True
What is the density of a rock with a mass of 2 kg and a volume of 0.001 m³?
2000 kg/m³
What is the formula for pressure?
P = F/A
1 atm is equivalent to 101,325
Pascals
.
True
Match the pressure unit with its equivalent in Pascals:
1 bar ↔️ 100,000 Pa
1 atm ↔️ 101,325 Pa
1 psi ↔️ 6895 Pa
What is density a measure of?
Mass within a volume
The standard units for density are kg/m³ or
g/cm³
True
ρ represents
density
in the density formula
True
What are the units for density?
kg/m³ or g/cm³
Arrange the steps to calculate the density of an object:
1️⃣ Measure the mass (m) of the object
2️⃣ Measure the volume (V) of the object
3️⃣ Divide the mass by the volume to find the density (ρ)
Match the pressure unit with its conversion factor:
Pascal (Pa) ↔️ 1 N/m²
Atmosphere (atm) ↔️ 101,325 Pa
Bar ↔️ 100,000 Pa
Pressure is defined as the force applied per unit
area
The variable P in the pressure formula represents
pressure
Match the property with its formula and unit:
Density ↔️ \rho = \frac{m}{V} (kg/m³)
Pressure ↔️ P = \frac{F}{A} (Pa)
What is the formula for density?
ρ
=
\rho =
ρ
=
m
V
\frac{m}{V}
V
m
What are the standard units for density?
kg/m³ or g/cm³
Match the pressure unit with its definition:
Pa ↔️ Force per unit area
psi ↔️ Pounds per square inch
atm ↔️ Standard atmospheric pressure
bar ↔️ 100,000 Pa
What are the standard units for pressure?
Pa, atm, bars, psi
What is the density of a rock with a mass of 2 kg and a volume of 0.001 m³?
2000 kg/m³
What is the definition of density in terms of mass and volume?
Mass per unit volume
Density and
pressure
are used to describe fluids.
True
If a force of 500 N is applied to an area of 0.5 m², the resulting pressure is
1000 Pa
In the density formula, 'm' represents
mass
What is the density of water in kg/m³?
1000 kg/m³
Steps to calculate density using the formula
ρ
=
\rho =
ρ
=
m
V
\frac{m}{V}
V
m
1️⃣ Measure the mass of the object
2️⃣ Measure the volume of the object
3️⃣ Divide the mass by the volume
The formula for density is
\rho = \frac{m}{V}
What is the standard unit for pressure?
Pascal (Pa)
Match the pressure unit with its conversion factor:
Pa ↔️ 1 N/m²
atm ↔️ 101,325 Pa
psi ↔️ ≈ 6895 Pa
bar ↔️ 100,000 Pa
What is the conversion factor for Pascals (Pa)?
1 N/m²
How many Pascals are in 1 bar?
100,000 Pa
What is the definition of pressure?
Force applied per unit area
Density is calculated as mass divided by
volume
.
Match the property with its formula and units:
Density ↔️ ρ = m/V, kg/m³
Pressure ↔️ P = F/A, Pa
A stone has a mass of 5 kg and a volume of 0.002 m³. What is its density?
2500 kg/m³
What is density a measure of?
Mass per volume
Match the substance with its approximate density in kg/m³:
Water ↔️ 1000
Iron ↔️ 7870
Air ↔️ 1.225
Aluminum ↔️ 2700
The standard unit for density is kilograms per cubic meter (kg/
m³
Pressure is defined as force applied per
unit
area.
True
The standard unit for pressure is the
Pascal
See all 71 cards
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