Category: Physics

Which solid has the highest melting point? tungsten Do impurities lower melting point? The presence of even a small amount of impurity will lower a compound’s melting point by a few degrees and broaden the melting point temperature range. Because the impurity causes defects in the crystalline lattice, it is easier to overcome the intermolecular […]

What is the difference between daylight and bright white bulbs? Bright white (4,000 to 5,000 Kelvin) is between white and blue tones. Daylight (5,000 to 6,500 Kelvin) has a more bluish tone. This light color will maximize contrast for colors, making it ideal for working, reading or applying makeup. What is standard light bulb size? […]

What is the intensity for muscular endurance? For experienced lifters who want to improve their muscular strength, aim for 8–12 reps per set for 2–4 sets, with a 2- to 3-minute rest between sets. To improve your muscular endurance, do 15–20 repetitions at no more than 50% of your 1RM, with a 2- to 3-minute […]

How do I know if my electric motor brushes are bad? If there’s a banging sound inside the tool’s motor when it runs, then it’s probably a brush. It could also be a bad armature, but if that is the case then it’s most likely that the brushes will have to be replaced anyway. As […]

What is needed for an ecosystem to support the greatest variety of organisms? Answer: An ecosystem must contain producers, consumers, decomposers, and dead and inorganic matter. All ecosystems require energy from an external source – this is usually the sun. Plants need sunlight to photosynthesize and produce glucose, providing an energy source for other organisms. […]

What is the black thing on a guitar called? The Soundhole: Most acoustic guitars have a sound hole in the middle of the guitar, though some guitars may have the sound hole in a different spot or not have one at all. The Bridge: The black part of the guitar on the other end of […]

How do you find distance rate and time problems? The formula for distance problems is: distance = rate × time or d = r × t. Things to watch out for: Make sure that you change the units when necessary. For example, if the rate is given in miles per hour and the time is […]

What to do if your neighbors are loud? What you can do about your loud neighbors. Document the offenses. There are a variety of ways you can do this. Give a courtesy knock. A courtesy knock may help. Pay your neighbor a visit. And if a friendly knock doesn’t work, you can pay them a […]

Has a hurricane ever hit Mississippi? 1969: Hurricane Camille Hurricane Camille is one of just four Category 5 storms to make landfall in the continental United States, according to the National Weather Service. The storm made landfall near Waveland, Mississippi, in August 1969. Storm surge reached almost 25 feet in parts of Mississippi. What was […]

What is the downside of having a smart meter? Although smart meters can help you keep track of your energy use, they could also drive up anxiety with elderly or low-income households if they’re constantly reminded of what they’re spending. This could lead to people depriving themselves of adequate heating or lights. How does a […]