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Science
The observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. Nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to Pluto, recently demoted from planet to dwarf planet. Questions on knowledge about the material and physical aspects of our world are asked and answered here.
203,801 Questions
What are two positive and two negative uses of petroleum?
Positive:
1) Petroleum is the primary fuel used in cars.
2) Petroleum can be used as a solvent.
Negative:
1) Petroleum is highly flammable and can be used in petrol bombs.
2) Burning petrol is harmful to the environment as it releases Carbon dioxide.
How much is 1 kilogram compared to 10000 milligrams?
1 kilogram = 1 million mg
10,000 milligrams = 10 kilograms
1 kilogram = 1,000,000 micrograms
From superscot85: As a kilogram is 1000 grams and a gram is 1000 milligrams, I stick by my answer of 1 million!
What price would Mars be if it were for sale?
the price could range from around a few thousand or a few billion dollars if it were ever for sale
What is measured in hoppersfeet?
Rear Admiral Grace Hopper was a pioneer in the computer industry. In her talks, she often would illustrate the speed of electricity by using a one-foot section of wire. Electricity can travel one foot in about one nanosecond (1 billionth of a second). Presumably this is where the term "Hopper's feet" or "hoppersfeet" came from.
Does the moon orbit at a speed of 10 km per hour?
No, the Moon orbits at a speed of 1.022 km per sec.or 3679.2 km per hour.
What is 2345987.1472 rounded to the nearest whole number?
the 7 after the 8 is in the ones place so we look one back to see which way we will round, the 1 is in the tenths place so we round down, the answer is 2,345,987
What are some alternative ways of collecting data in a classroom setting?
Telephone survays, Census, Mail-in queationnaire, presentations by citizens, research, door-to-door interveiws
stuff like that?
Why is the speed of light constant if it is constant?
It is constant, because it's determined by the electrical properties of the
vacuum or material stuff it's traveling through. So as long as the electrical
permittivity and magnetic permeability of the medium don't change, the
speed that they determine doesn't either.
The constant speed of light "C" (for example in E=mC2) is the speed of light in a vacuum. Light in other mediums, such as glass, moves slower and creates such effects as refraction.
How did they derive the formula from English system to metric system?
because it is better to use metric converter than english converter
Is shawdow formed in a straight line?
If its light from the sun, yes, its vast distance from us means the light waves are essentially parallel
How long would it take to go 1500 meters if you go 100 meters per 10 seconds?
As time equals distance divided by speed you get;
t=1500/10 (100/10 so you are in m/s)
Therefore it would take 150 seconds
How many kilometers is 100 miles?
100 * 5= 500 / 3 = 500/3 or 166.666667 km
That is a very crude approximation.
100 miles = 160.9344 km (about 3.5% smaller).
There are 0.621371192 miles in 1 kilometer. This might be useful in converting kilometers to miles. For example, you would use this formula to find out how many miles were in 5 kilometers. 5 kilometers x 0.621371192 miles/1 kilometer = 3.10685596 miles Voila!
What is a 4 sided figure with only 1 pair of parallel sides?
Trapeziod, under the quaderlateral family
