What makes online test valid? Validity is arguably the most important criteria for the quality of a test. The term validity refers to whether or not the test measures what it claims to measure. On a test with high validity the items will be closely linked to the test’s intended focus. What makes a test […]
Is Li2 or Be2 more stable?
Is Li2 or Be2 more stable? Be2 Is Stable And Diamagnetic, Bit Li2 Is Unstable. Would Be2+ exist? Be2+ has a bond order of 0.5 and is slightly lower in energy than isolated Be atoms. It will probably exist under special experimental conditions but be unstable. Is Be2 paramagnetic or diamagnetic? Be2 is shown with […]
What is the unit of buoyant force?
What was the Karez well system?
What was the Karez well system? The Karez Well System is an important ancient irrigation system that is still used in Turpan, Xinjiang, in Northwest China. (Karez is the Uyghur word for ‘well’, from the Persian for ‘channel’.) Locals dug wells and tunnels to transfer water from mountains miles away from their farmland. Why is […]
What is a center link in the steering?
What is a center link in the steering? A center (drag) link is a suspension component that is found on many road going vehicles equipped with steering gear box suspension systems. It is the component that links the steering gear box to the pitman arm so that the vehicle can be steered and maneuvered when […]
How do you calculate weight from a load?
What causes electric sockets to stop working?
What causes electric sockets to stop working? Usually, the culprit is either a tripped breaker or a bad connection. The outlet might have a bad connection, or the circuit breaker might need to be reset. Luckily for you, you might be able to find the solution when you take these steps, and you may not […]
How are pathogens removed from the body?
How are pathogens removed from the body? The antibodies destroy the antigen (pathogen) which is then engulfed and digested by macrophages. White blood cells can also produce chemicals called antitoxins which destroy the toxins (poisons) some bacteria produce when they have invaded the body. How does the human body defend itself against pathogens? In general, […]
Has Mount Etna killed anyone?
Has Mount Etna killed anyone? A study on the damage and fatalities caused by eruptions of Etna in historical times reveals that only 77 human deaths are attributable with certainty to eruptions of Etna, most recently in 1987 when two tourists were killed by a sudden explosion near the summit. Is Mt Etna dangerous? At […]
What are the cons of gas?
What are the cons of gas? Non-renewable fuel, supply cannot be replaced for millennia. Emits carbon dioxide when burned. Contains 80-95% methane, a potent greenhouse gas (GHG) Explosive, potentially dangerous. Concentrated sources require long distance transmission and transportation. Energy penalties at every stage of production and distribution. What are the side effects of natural gas […]