What did Penzias and Wilson discovery prove? Penzias and Wilson had spotted the CMB, the predicted thermal echo of the universe’s explosive birth. The landmark find put the Big Bang theory on solid ground, suggesting that the cosmos did indeed grow from a tiny seed — a single point — about 13.8 billion years ago. […]
Is United States in the Western Hemisphere?
Is United States in the Western Hemisphere? The United States is located in both the Northern and Western hemispheres. The Equator divides the Earth into Northern and Southern hemispheres while the Prime Meridian divides the Earth into Eastern and Western hemispheres. How many countries are in the Western world? A Partial List of Western Countries […]
Why is a touchdown six points?
Who invented 360 degrees?
Who invented 360 degrees? Timocharis, Aristarchus, Aristillus, Archimedes, and Hipparchus were the first Greeks known to divide the circle in 360 degrees of 60 arc minutes. Eratosthenes used a simpler sexagesimal system dividing a circle into 60 parts. What is 360 rotation? “Doing a 360” means spinning around completely once (spinning around twice is a […]
Which best describes the future of employment in the energy career cluster?
Which best describes the future of employment in the energy career cluster? Which best describes the future of employment in the Energy career cluster? Oil and gas extraction and developing plant-based fuels are on the rise while coal mining, metal ore mining, and pipeline transportation are on the decline. Alton works in Energy Transmission. What […]
Can you or can you please?
Can you or can you please? “Could” is the polite form of “can”—so both are correct, but we use them in different situations. We use “can” when we are telling someone to do something. We use “could” when we are making a request. Teacher to students: “Can you please be quiet!” What does explain yourself […]
What is the most important compound?
What is the most important compound? water What are the 10 most common compounds? Glossary Compound Formula Abundance parts per million by weight Silicon dioxide SiO2 428,600 Magnesium oxide MgO 350,700 Ferrous oxide FeO 89,700 Aluminum oxide Al2O3 69,900 What are examples of common compounds? Examples of Compounds – Common Compounds C2H6O: Alcohol. NaCl: Salt. […]
How accurate is a spectrophotometer?
How accurate is a spectrophotometer? The minimum is not sharp and good results can be expected in a transmittance range from 0.2 to 0.6 or an absorbance range from 0.7 to 0.2. An inspection of the graph below indicates that transmittance values of 0.1 and 0.8 are the outside limits between which one can expect […]
Is a Van de Graaff generator dangerous?
Is a Van de Graaff generator dangerous? Preliminary cautions: The Van de Graaff can produce a spark that is simply irritating or quite dangerous. A spark several centimeters long can be the equivalent of 100 000 volts or more. What is the principle of the Van de Graaff generator? The Van De Graaff generator works […]