What of the following is an advantage of the thermal properties of plastic?(1 point)
Options:
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.
Which phase change is the opposite of boiling?(1 point)
Options:
condensation
evaporation
melting
freezing
The correct answer is condensation.
Options:
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.
Which phase change is the opposite of boiling?(1 point)
The advantage of the thermal properties of plastic among the given options is: Plastics are easy to mold into any shape.
The advantage of the thermal properties of plastic is that plastics are easy to mold into any shape. This is option 3.
The phase change that is the opposite of boiling is condensation. This is option 1.
To determine the correct answer to the question about the advantage of the thermal properties of plastic, we need to examine each option and evaluate if it is an advantage.
1. "Plastics are safe to use in microwave ovens": This is indeed an advantage of the thermal properties of plastic. Plastics can withstand the heat generated in microwave ovens without melting or releasing harmful chemicals. Therefore, this option is a correct answer.
2. "Heating plastics eliminates the risk of BPA exposure": While heating plastics can reduce the risk of BPA (bisphenol A) exposure, it is not an inherent advantage of the thermal properties of plastic. BPA exposure is specific to certain types of plastic containing this chemical. Therefore, this option is not a correct answer.
3. "Plastics are easy to mold into any shape": While this statement is true, it is not directly related to the thermal properties of plastic. It relates more to the physical properties of plastic and its ability to be molded. Therefore, this option is not a correct answer.
4. "The thermal conductivity of plastic is very high, making it a good material to transmit heat": This statement is not accurate. The thermal conductivity of plastic is generally low, meaning that it does not transmit heat efficiently compared to materials with high thermal conductivity, such as metals. Therefore, this option is not a correct answer.
Based on the analysis, the correct answer to the question is: "Plastics are safe to use in microwave ovens."
Now, moving on to the second question about the phase change opposite to boiling.
The opposite of boiling is the phase change from a gas to a liquid. This phase change is called "condensation." Therefore, the correct answer to the question is: "condensation."