Everyday Science Mcqs

At what temperature are Celsius and Fahrenheit equal?

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At what temperature are Celsius and Fahrenheit equal?

A. -40 degree
B. 40 degree
C. -10 degree
D. 10 degree

The formulas for converting between degree Celsius and degree Fahrenheit are:
°F = (°C * 9/5) + 32
°C = (°F – 32) * 5/9
To find the temperature when both are equal, we use an old algebra trick and just set ºF = ºC and solve one of the equations.
°C = (°C * 9/5) + 32
°C – (°C * 9/5) = 32
-4/5 * °C = 32
°C = -32 * 5/4
°C = -40
°F = (°F * 9/5) + 32
°F – (°F * 9/5) = 32
-4/5 * °F = 32
°F = -32 * 5/4
°F = -40
So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees.

what is anthracite?

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what is anthracite?

A. Carbon
B. Hard coal
C. Ammonia
D. None of these

Anthracite, often referred to as hard coal, is a hard, compact variety of coal that has a submetallic luster. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals.

When Pluto was cast out from the list of Planets?

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When Pluto was cast out from the list of Planets?A. September 24, 2006
B. April 28, 2004
C. January 26, 2006
D. August 24, 2006

The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one- it “has not cleared its neighboring region of other objects.”
In August 2006 the International Astronomical Union (IAU) downgraded the status of Pluto to that of “dwarf planet.”