What is a good question to ask about space? How does the expansion of the universe make outer space a vacuum? How large would a bucket of water have to be to put out the sun? How long before the expansion of the universe causes our earth to drift away from the sun? How long […]
Why can some mixtures be separated by chromatography?
Why can some mixtures be separated by chromatography? Chromatography can be used to separate mixtures of coloured compounds . As the solvent soaks up the paper, it carries the mixtures with it. Different components of the mixture will move at different rates. This separates the mixture out. How many main ways are there to separate […]
Is Moon hotter than Sun?
Is Moon hotter than Sun? Temperatures on the moon are extreme, ranging from boiling hot to freezing cold depending on where the sun is shining. When sunlight hits the moon’s surface, the temperature can reach 260 degrees Fahrenheit (127 degrees Celsius). When the sun goes down, temperatures can dip to minus 280 F (minus 173 […]
Is it illegal to shine a laser pointer into the sky?
Is it illegal to shine a laser pointer into the sky? The answer is, no, it is not legal to point a laser in the sky indiscriminately. Individuals have been imprisoned for intentionally shining a laser at low flying aircraft, and other individuals have been fined very meaningfully for carelessly unintentionally irradiating aircraft. Are purple […]
Which rock is classified as an evaporite?
Which rock is classified as an evaporite? Minerals in evaporite rocks include carbonates (especially calcite, dolomite, magnesite, and aragonite), sulfates (anhydrite and gypsum), and chlorides (particularly halite, sylvite, and carnallite), as well as various borates, silicates, nitrates, and sulfocarbonates. Which of the following igneous rocks will cool the fastest? Extrusive igneous rocks form above the […]
Why Bubbles are not formed in water?
Why Bubbles are not formed in water? Atmospheric gases such as nitrogen and oxygen can dissolve in water. The amount of gas dissolved depends on the temperature of the water and the atmospheric pressure at the air/water interface. Hence bubbles along the insides of your water glass. Where do you think the bubbles came from? […]
What happens at an evidence hearing?
What happens at an evidence hearing? The preliminary hearing is like a mini-trial. The prosecution will call witnesses and introduce evidence, and the defense can cross-examine witnesses. If the judge concludes there is probable cause to believe the crime was committed by the defendant, a trial will soon be scheduled. How do you win a […]
How is the state of water determined?
How is the state of water determined? The number of bonds between molecules determines whether water will be a solid, liquid, or gas. In the solid state, water molecules have the maximum number of hydrogen bonds (4 per molecule), giving water the rigid characteristic of ice. What are three different states of water? Water can […]
What are the factors that affect soil stability?
What are the factors that affect soil stability? factors influence the size, distribution, and stability of soil aggregates. Among these factors are the method of taking and handling the sample, season of the year, moisture content of the soil at time of sampling, past soil management practices, and method of determining and expressing soil aggregation. […]
Can sound waves bend?
Can sound waves bend? Sound waves do, indeed, bend. In an underwater thermal gradient the sonar waves can bend enough to create blind spots, so that you can not “see” a target that would ordinarily be well within sonar range. The other example is the difference in how well sound carries up/down wind. What is […]