Category: Physics

How can standing waves be prevented? The solution to stopping a standing wave is cutting the offending frequency of the related instrument….Standing waves can be caused when waves bounce between; Opposite walls. Four sides of the room. All six sides of the room (given most rooms have four walls, a floor, and a ceiling!) Why […]

Is it OK to put dry ice in the freezer? If you keep it in the freezer, it will not only melt into a gas quickly, since the freezer is so much warmer than the temperature of dry ice, but it could also cause the freezer to shut down. Follow this tip: The best place […]

Did cannonballs have explosives in them? A cannonball is a solid ball of metal. It did not contain any explosive material and its killing power came simply from a fact that it was a ball of metal travelling at a very high speed. How fast is a cannonball mph? 106 mph (171 km/h) average. Set […]

What instrument can make any sound? What instrument can make any sound and be heard but not touched or seen? Your voice. What are examples of idiophones? Idiophones make their sound by hitting, rubbing or shaking. Drums are not idiophones. Neither are stringed instruments. Examples of idiophones include the triangle, wood block, maracas, bell, and […]

How can I generate electricity cheaply? The IRENA report found that solar and onshore wind are the cheapest energy sources. It states that in 2017 wind turbine prices had an average cost of $0.06 per kWh, and at times dropped to $0.04 per kWh. What is the cheapest power generation? solar power schemes Is using […]

What would happen if the rabbit population suddenly doubled? In the stable food chain shown, what would you expect to happen initially if you were to suddenly double the population of rabbits? The populations of the other three species would also increase. The populations of the other three species would decrease. The grass population and […]

Who is the tallest man on earth in 2020? Sultan Kösen Who is the shortest man alive? Chandra Bahadur Dangi Who is the tallest kid in the world? Brenden Adams Born September 20, 1995 Ellensburg, Washington, U.S. Known for Formerly the tallest teenager in the world Height 7 ft 8 in (2.34 m) How tall […]

How do you calculate half-life examples? The quantity of radioactive nuclei at any given time will decrease to half as much in one half-life. For example, if there were 100g of Cf-251 in a sample at some time, after 800 years, there would be 50g of Cf-251 remaining. After another 800 years (1600 years total), […]

What are 2 ways to keep a gas dissolved in a liquid? The solubility of a gas in a liquid will increase if: Lower the temperature of the solution , and therefore, lower the kinetic energy of the gaseous particles so they can escape the liquid phase less often. What is the general rule used […]

What colors do plants absorb best? Short answer: plant absorbs mostly “blue” and “red” light. They rarely absorb green for its mostly reflected by plant, that makes them green! Long answer : Photosynthesis is the ability of plants to absorb the energy of light, and convert it into energy for the plant. Do plants grow […]