What of the following is an advantage of the thermal properties of plastic?
Plastics are safe to use in microwave ovens.
Heating plastics eliminates the risk of BPA exposure.
Plastics are easy to mold into any shape.
The thermal conductivity of plastic is very high, making it a good material to transmit heat.
Plastics are safe to use in microwave ovens.
which phase change is the opposite of boiling?
The opposite phase change of boiling is condensation.
As the pressure of an enclosed gas decreases to half its original value, what happens to the volume of the gas if temperature is held constant?
The volume increases to four times its original value.
The volume increases to twice its original value.
The volume decreases to one-fourth of its original value.
The volume decreases to half of its original value.
The volume increases to twice its original value.
here are 300 light particles in an airtight container. Which adjustment would increase the speed of the particles?(1 point)
keeping the pressure constant and increasing the temperature
keeping the volume constant and cooling the container
keeping the temperature constant and increasing the container volume
keeping the volume constant and replacing the light particles with heavy particles
keeping the pressure constant and increasing the temperature
The relationships among which variable quantities are expressed by the ideal gas law equation?(1 point)
pressure, volume, temperature, molar mass
volume, temperature, number of moles, gas constant
pressure, volume, temperature, number of moles
pressure, volume, number of moles, mass
pressure, volume, temperature, number of moles
The correct answer is: "Plastics are easy to mold into any shape."
To arrive at this answer, we need to understand the advantages of the thermal properties of plastic. The given options are:
1. Plastics are safe to use in microwave ovens: This is not directly related to the thermal properties of plastic. It is a general characteristic of some plastics to be microwave-safe, which means they do not melt or release harmful substances when heated in a microwave.
2. Heating plastics eliminates the risk of BPA exposure: Again, this is not specifically related to the thermal properties of plastic. BPA (Bisphenol-A) is a chemical compound commonly used in the production of certain plastics, but its exposure and elimination are not directly linked to the thermal behavior of plastic.
3. Plastics are easy to mold into any shape: This is directly related to the thermal properties of plastic. One of the advantages of plastic is that it can be easily heated and molded into various shapes when it reaches a specific temperature. This property is often utilized in manufacturing processes, such as injection molding or thermoforming, to produce complex and customized plastic products.
4. The thermal conductivity of plastic is very high, making it a good material to transmit heat: This statement is incorrect. In reality, plastic has low thermal conductivity, meaning it does not easily transfer heat. Therefore, it is not generally used to transmit heat efficiently.
Hence, the correct answer is: Plastics are easy to mold into any shape.