Does hot water flow faster than cold? Molecules in a liquid have enough energy to move around and pass each other. Warm water has more energy than cold water, which means that molecules in warm water move faster than molecules in cold water. Does water move slower when cold? The molecules of cold water are […]
What is the physical property of filtration?
What is the physical property of filtration? Physical separation methods, such as filtration and distillation, are based on the difference in particle size and on the boiling point of the substances in the mixture, respectively. These are properties that can be observed and measured without changing the material itself. What kind of mixture can be […]
Should you put plastic behind insulation?
Should you put plastic behind insulation? Without a vapor barrier in place, condensation inside the walls could ruin the insulation and promote the growth of harmful mold and bacteria. Plastic, specifically 6-mil polyethylene plastic, is the most commonly used vapor barrier. Should you put plastic over insulation before drywall? Without poly beneath the drywall, water […]
Is the atomic number the number of electrons?
Is the atomic number the number of electrons? The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons. The sum of the atomic number Z and the number of neutrons N gives […]
What did they use for light in 1600s?
What did they use for light in 1600s? Medieval lighting came from large central fireplaces, candles, rush lights, flaming torches or lanterns. Candles, which had been around since Roman times, were made from animal fat, or beeswax if you were wealthy. How did people light candle chandeliers? The very wealthy used high grade beeswax candles, […]
What is honesty with example?
What is honesty with example? The definition of honest is someone or something that is truthful, trustworthy or genuine. An example of honest is someone telling their friend that a meal they prepared had too much salt. An example of honest is a student admitting they cheated on a test. Honest weight. What three things […]
What is the reading on the vernier calipers?
Which two scales are used to measure the temperature?
Which two scales are used to measure the temperature? The three most common temperature scales are Fahrenheit, Celsius, and Kelvin. Temperature scales are created by identifying two reproducible temperatures. The freezing and boiling temperatures of water at standard atmospheric pressure are commonly used. What is the formula for finding Celsius? How to Convert Temperatures. First, […]
What does a subscript mean in math?
What does a subscript mean in math? A small letter or number placed slightly lower than the normal text. Examples: • the number 1 here: A1 (pronounced “A sub 1” or just “A 1”) What does a subscript tell you? Chemical formulas use letters and numbers to represent chemical species (i.e., compounds, ions). The numbers […]
How old is the oldest writing?
How old is the oldest writing? 5,500 years ago What is the oldest writing system still in use today? As far as written languages go, Sumerian and Egyptian seem to have the earliest writing systems and are among the earliest recorded languages, dating back to around 3200BC. But the oldest written language that is still […]