What is the coefficient of performance of this heat pump? A good COP for heat pump units starts at about 2.0 for an air source heat pump and about 3.1 for geothermal, but heat pump COP can be well above 4.0 too, as seen in the chart below. A geothermal heat pump is also called […]
Why is it called the Seven Sisters?
Is mining a pollution?
Is mining a pollution? Uncontrolled mining pollution has a literal ripple effect. Mine waste, heavy metals and acidic water often end up in streams and rivers. Mining has polluted the headwaters of more than 40 percent of Western watersheds, according to the EPA. “Mining is the nation’s largest source of toxic pollution. How can mining […]
Who did Watson and Crick meet at the party?
Who did Watson and Crick meet at the party? When Watson meets a researcher from King’s College at Crick’s flat, Crick introduces him by saying: “Maurice has a cuckoo in his nest…” A cuckoo lays its eggs in another bird’s nest and lets the foster mother care for it. Explain what Crick meant this odd […]
Where is midpoint formula used?
Where is midpoint formula used? The midpoint formula is applied when one is required to find the exact center point between two defined points. So for a line segment, use this formula to calculate the point that bisects a line segment defined by the two points. Are midpoint sums overestimates? If the graph is concave […]
How do ions get their charge?
What is the strongest IMF in CBr4?
What is the strongest IMF in CBr4? dispersion forces Why is Tetrabromomethane least polar? CBr4 (Carbon tetrabromide) is nonpolar in nature because of the symmetrical arrangement of four bromine atoms around carbon. As a result, the dipoles of the C-Br bond get canceled by each other resulting in CBr4 a nonpolar molecule. Does CBr4 have […]
Do cirrus clouds bring rain?
Do cirrus clouds bring rain? They are wispy, being composed entirely of ice crystals falling through the atmosphere. If Cirrus are carried horizontally by winds moving at different speeds, they take a characteristic hooked shape. Only at very high altitudes or latitudes do Cirrus produce rain at ground level. What does a GREY cloud mean? […]
Is an egg cooking in a frying pan An example of convection?
Is an egg cooking in a frying pan An example of convection? Heat is transferred by conduction, convection, and radiation. Conduction is heat transfer by direct contact, like frying an egg. Convection is heat transfer by the movement of gases or liquids, like most home furnaces, clothes dryers, or car heaters. Why conduction is the […]
Where is electric generator used?
Where is electric generator used? Electric generator, also called dynamo, any machine that converts mechanical energy to electricity for transmission and distribution over power lines to domestic, commercial, and industrial customers. Generators also produce the electrical power required for automobiles, aircraft, ships, and trains. What are the four major parts of an electric generator? The […]