In math, "pi" is equal to?
Which of these sound-playing devices was invented first?
What unit of measurement is one-thousandth of a gram?
What liquid is used as a standard when measuring density?
If my weight is 300 pounds and I walk on the moon, what will be my weight there?
The moon's gravity is 1/6 of Earth's hence our weight would be 1/6 of our weight on Earth. However our mass remains the same.
Which of these has a frequency higher than that of visible light?
The frequency of visible light is between 4 * 10^14 hertz to 7 * 10^14 hertz. The frequency of ultraviolet light is in between 8 * 10^14 hertz to 3 * 10^16 hertz frequency range. Ultraviolet light is used for sterilization of medical equipment and killing bacteria in water.
True or False: Water will boil faster in a mountainous area than at a sea level area
At sea level water boils at 100 degrees Celsius or 212 degrees Fahrenheit. As the height increases, the boiling point of water decreases due to the decrease in atmospheric pressure. So water will boil faster in mountainous areas.
Graphite is a crystalline form of which element?
Graphite is also found in batteries and brake linings among many other uses.
What is the velocity of sound in vacuum?
None, there is no sound in a vacuum
Humans are also exposed to radiation from man-made sources. Which of the following man-made sources accounts for the largest percentage of exposure to general populations?
Building and road construction materials
What do you call a substance containing only one kind of atom?
The laws of physics tell us that energy is...
The law of conservation of energy states that energy goes from one form to another and never actually goes away.
Which of these elementary particles is known as "massless"?
Shai K.
12/27/2020
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