Can a room be cooled indefinitely by leaving the door of the refrigerator open? No, the room can’t be cooled by leaving the door of an electric refrigerator open. In fact the temperature of the room rises because the refrigerator extracts heat from the freezing chambers and rejects it to the surrounding air in the […]
Can you hear without middle ear bones?
Can you hear without middle ear bones? The piston-like action generates vibrations in the fluid-filled inner ear that are used to signal the brain of a sound event. Without the middle ear ossicles, only about 0.1 percent of sound energy would make it into the inner ear. How do you test for otosclerosis? Otosclerosis is […]
How did Tilly know it was a tsunami?
How did Tilly know it was a tsunami? “What’s a tsunami?” her mother asked. Tilly explained that she had learned about tsunamis at school a few weeks ago. “They are strong waves caused by undersea earthquakes,” she said. “And they travel very fast. How did Tilly become aware of the upcoming calamity? Tilly had become […]
How breccia is formed?
How breccia is formed? Breccia forms where broken, angular fragments of rock or mineral debris accumulate. One of the most common locations for breccia formation is at the base of an outcrop where mechanical weathering debris accumulates. Another is in stream deposits a short distance from the outcrop or on an alluvial fan. How hard […]
What does current flow mean?
What does current flow mean? Current flow basically means the flow of electric charges with respect to time. In an electric circuit, when the electric charge is flowing in one direction, the current will flow in the opposite direction. From Ohm’s law, the current can be defined as the voltage through the circuit per unit […]
What are the 4 types of minerals?
What are the 4 types of minerals? Types of minerals Native elements. eg. Gold, Silver, Mercury, graphite, diamond. Oxides. eg corundum (incl. sapphire), hematite, spinel. Hydroxides. eg. Goethite, brucite. Sulfides. eg. Pyrite, galena, sphalerite. Sulfates. eg. Baryte, gypsum. Carbonates. eg. Calcite, magnesite, dolomite. Phosphates. eg. Apatite, monazite. Halides. eg. What are the 2 main types […]
Why is alkaline hydrolysis preferred?
Why is alkaline hydrolysis preferred? Hydrolysis using dilute alkali There are two big advantages of doing this rather than using a dilute acid. The reactions are one-way rather than reversible, and the products are easier to separate. Why is hydrolysis reversible? Hydrolysis is a reversible reaction, meaning that the alcohol and acid groups can react […]
Is soda is a mixture?
Is soda is a mixture? Soda is considered a heterogeneous mixture. It contains water, sugar, and carbon dioxide, which forms bubbles. While the sugar, water, and flavorings may form a chemical solution, the carbon dioxide bubbles are not uniformly distributed throughout the liquid. Is Salt a mixture? Ordinary table salt is called sodium chloride. It […]
What is the difference between a clutch and a torque converter?
What is the difference between a clutch and a torque converter? The way a torque converter operates compared to a clutch is very different. The main difference is that torque converters idle before they engage and they start to engage at around 1,700 RPM. While clutches engage earlier, they have a slip range at about […]
Are water slides dangerous?
Are water slides dangerous? Water slides are the number one cause of injuries at water parks. So, follow ride directions. Rules like “feet first” are there for a reason―to keep riders safe. Can you fall out of a water slide? It’s the water running down the slide, creating an almost frictionless surface, that makes this […]