Why COP of heat pump is more than refrigerator? (See thermal efficiency of a heat engine.) Note that the COP of a heat pump depends on its direction. The heat rejected to the hot sink is greater than the heat absorbed from the cold source, so the heating COP is greater by one than the […]
What are 6 different tests that are used to identify minerals?
What are 6 different tests that are used to identify minerals? Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. What are the two main types of mineral classification? Minerals are classified based on their crystal form and chemistry. Minerals are divided into […]
What part of atom has no charge?
What part of atom has no charge? neutron Is an atom mostly empty space? Atoms are not mostly empty space because there is no such thing as purely empty space. Atoms are filled with electrons. It’s true that a large percentage of the atom’s mass is concentrated in its tiny nucleus, but that does not […]
Will Dust Bowl happen again?
Will Dust Bowl happen again? More than eight decades later, the summer of 1936 remains the hottest summer on record in the U.S. However, new research finds that the heat waves that powered the Dust Bowl are now 2.5 times more likely to happen again in our modern climate due to another type of manmade […]
Is burning 300 calories a day good?
Is burning 300 calories a day good? The participants who exercised for 30 minutes a day, burning 300 calories, lost an average of 7 pounds. It doesn’t seem to make mathematical sense, but neither do your hunger habits. Researchers found that participants in the 600-calorie category were eating more in each meal and snack. How […]
What is a good insulator?
What is a good insulator? Plastic, rubber, wood, and ceramics are good insulators. These are often used to make kitchen utensils, such as saucepan handles, to stop heat from flowing up to burn the cook’s hand. Plastic coating is also used to cover most electrical wires in appliances. Air is also a good insulator of […]
How can I tell if my glass is heat-resistant?
How can I tell if my glass is heat-resistant? If it is a heat-resistant glass, there will generally be a corresponding label on the glass, indicating the temperature and range of use; If you find nominal Pyrex glass at a low price, consider its authenticity. Is all glass heat-resistant? Glass is thermal-shock resistant, meaning it […]
How far away can the siren be heard?
How far away can the siren be heard? The physics of sound will reduce the volume of the siren as the distance from the siren increases. With today’s modern vehicles, the effective range of the siren at a 90-degree intersection is often no more than 80 feet. Does pitch change with distance? Sound waves that […]
What are the key interest groups in relation to the ethical violation?
What are the key interest groups in relation to the ethical violation? Ethical Violation Paper The Key interest groups in relation to the ethical violation The key interest group in relation to ethical violation is the fact of not following protocol, Racial profiling suspect, Use brutality on suspect, Abused of power on suspect, not following […]
How do you put standard form into a calculator?
How do you put standard form into a calculator? How to Write in standard form? Write down the number. Identify the decimal point in the number. If there is no decimal point in the given number, it is considered as at the right side of the number after the last digit. After identifying the decimal […]