What is the difference between mass and weight of an object?
The mass of an object is a measure of the amount of matter in the object, while the weight of an object is the force exerted on the object due to gravity.
Mass is an intrinsic property and is independent of the location of an object. It remains the same regardless of the gravitational force acting on it. Mass is usually measured in kilograms (kg).
Weight, on the other hand, is a gravitational force and depends on the mass of the object and the gravitational acceleration. It is the force with which an object is pulled towards the center of the Earth or any other celestial body. Weight is measured in newtons (N).
We can calculate weight using the formula: Weight = Mass × gravitational acceleration. In everyday life, we usually use weight to describe the heaviness or lightness of objects.
In science lab you are given the four substances listed below with their densities:Honey = 1.42g/cm^3Olive oil = 0.90g/cm^3Water = 1.00g/cm^3Ethyl alcohol = 0.81g/cm^3You are asked to combine all four substances in a beaker and observe how they separate. List the order in which the four liquids separate, starting with the one on top to the one on the bottom of the beaker.
To determine the order in which the four substances separate in a beaker, we need to compare their densities. The substance with the lowest density will float on top, while the substance with the highest density will sink to the bottom.
Order of separation, from top to bottom:
1. Ethyl alcohol (density = 0.81g/cm^3)
2. Olive oil (density = 0.90g/cm^3)
3. Water (density = 1.00g/cm^3)
4. Honey (density = 1.42g/cm^3)
Therefore, when these four substances are combined in a beaker, the ethyl alcohol will be on top, followed by the olive oil, water, and finally, the honey at the bottom.
Something that has mass and occupies space is known as ______________.
Something that has mass and occupies space is known as matter.
The change from a gas to a liquid is called _____________.
The change from a gas to a liquid is called condensation.
The formula for density is
The formula for density is:
Density = Mass / Volume
Where:
- Density is measured in units such as grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).
- Mass is the amount of matter in an object, typically measured in grams (g) or kilograms (kg).
- Volume is the amount of space occupied by an object, usually measured in cubic centimeters (cm³) or cubic meters (m³).
What is the density of an object that has a mass of 34 grams and a volume of 17 milliliters? You may use a calculator if needed.
To find the density of an object, we use the formula Density = Mass / Volume.
In this case, the mass of the object is 34 grams and the volume is 17 milliliters. However, for the formula, we need to convert the volume from milliliters (mL) to cubic centimeters (cm³) since density is typically expressed in g/cm³.
1 milliliter is equivalent to 1 cubic centimeter, so the volume of the object is also 17 cm³.
Now, we can calculate the density:
Density = Mass / Volume
Density = 34 grams / 17 cm³
Density = 2 grams/cm³
Therefore, the density of the object is 2 grams per cubic centimeter (2 g/cm³).
A ________________________________________________________________ has no defined shape and a defined volume. A
A liquid has no defined shape and a defined volume.
A ________________________________________________________________ has no defined shape and and no defined volume.
A gas has no defined shape and no defined volume.
The TOTAL energy of all particles in an object is known as
The total energy of all particles in an object is known as thermal energy.
Which of the following is an example of a physical property?
An example of a physical property is:
- Melting point
- Density
- Color
- Odor
- Conductivity
Any of these options can be considered physical properties, as they describe characteristics of a substance that can be observed or measured without changing the substance's chemical composition.
All methods used to separate a mixture are based on the substances'
All methods used to separate a mixture are based on the substances' physical properties.
Which of the following combinations are both best classified as heterogeneous mixtures?
To determine which combinations are best classified as heterogeneous mixtures, we need to identify mixtures where the components are not evenly distributed and can be visibly distinguished.
Potential combinations that are best classified as heterogeneous mixtures are:
- Sand and water: In this mixture, the sand particles do not dissolve in water and can be visibly seen as separate components.
- Oil and vinegar: Oil and vinegar do not mix evenly and can be identified as distinct layers within the mixture.
- Salad dressing: Depending on the specific dressing, it may contain separate visible components such as oil, vinegar, herbs, and spices that do not mix uniformly.
These combinations exhibit visible differences in the components, indicating heterogeneous mixtures.