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Unit 1: Motion, Force, Density, and Kinetic Theory
1.5 Density and Kinetic Theory
1.5.1 Density
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Cards (59)
What does g/cm³ stand for?
Grams per cubic centimeter
The density of water is approximately
1.0
g/cm³
The formula for calculating density is
Density
= Mass / Volume
What is the density of aluminum in g/cm³?
2.7
The density of a material depends only on its mass.
False
Knowing the density of a material can help determine its composition and
properties
What are the units for measuring density?
kg/m³ or g/cm³
Understanding density can help determine the composition of a material.
True
Match the material with its density in g/cm³:
Aluminum ↔️ 2.7
Water ↔️ 1.0
Iron ↔️ 7.9
The density of gold in kg/m³ is approximately
19300
To convert g/cm³ to kg/m³, you multiply by
1000
Higher pressure generally increases the density of a substance.
True
The density of aluminum in kilograms per cubic meter is
2700
Increasing the temperature of a substance typically
decreases
its density.
The formula for density is
ρ
=
\rho =
ρ
=
m
V
\frac{m}{V}
V
m
, where \rho</latex> represents density.
Density is calculated as mass divided by
volume
.
True
Match the material with its density in kilograms per cubic meter:
Water ↔️ 1000
Aluminum ↔️ 2700
Gold ↔️ 19300
Higher pressure increases the density of a substance.
True
Match the factor with its effect on density:
Temperature ↔️ Density decreases
Pressure ↔️ Density increases
Cooling a substance reduces particle motion, decreasing volume and increasing
density
Steps for determining density using the displacement method
1️⃣ Submerge the object in water
2️⃣ Measure the volume of water displaced
3️⃣ Use the mass and displaced volume to calculate density
What principle is used in the third method for determining density?
Archimedes' Principle
What is a disadvantage of the displacement method for determining density?
May not work for soluble materials
What effect does increasing temperature have on density?
Decreases density
Match the material with its density (g/cm³):
Water ↔️ 1.0
Aluminum ↔️ 2.7
Iron ↔️ 7.9
Gold ↔️ 19.3
What is density a measure of?
Mass per unit volume
Arrange the following materials in order of increasing density (g/cm³): Water, Aluminum, Iron
1️⃣ Water
2️⃣ Aluminum
3️⃣ Iron
Denser materials have a lower mass per unit volume.
False
The density of water is approximately
1000
kg/m³
What is the formula for calculating density?
Density = Mass / Volume
Density is a measure of the mass per unit volume of a substance.
True
Density is affected by both temperature and
pressure
.
True
What are the two primary factors affecting density?
Temperature and pressure
Density is measured in units of kilograms per cubic
meter
Temperature and pressure are the two primary factors affecting
density
.
True
Higher pressure reduces the density of a substance.
False
Order the steps of the displacement method for determining density:
1️⃣ Submerge the object in a liquid
2️⃣ Measure the volume of liquid displaced
3️⃣ Calculate the density using the object's mass
Match the material with its approximate density in grams per cubic centimeter:
Aluminum ↔️ 2.7
Water ↔️ 1.0
Iron ↔️ 7.9
The SI unit for density is kilograms per cubic
meter
.
Heating a substance causes its particles to move faster and spread out,
decreasing
its density.
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