What is the Greek root word of photograph?
What is the Greek root word of photograph?
Although photography as we know it did not emerge until the 19th century, the word photograph evolved from the ancient Greek words phot-, “light,” and graph-, “writing,” which were combined to create the word for taking pictures — “light writing.” Nowadays we take our photographs with electronic cameras, recording.
What is the meaning of the word photo?
photo- a combining form meaning “light” (photobiology); also used to represent “photographic” or “photograph” in the formation of compound words: photocopy.
What does the Latin word photo mean?
LIGHT
What two Greek words are the origin of photography?
2 Photography Defined The word photography, comes from two ancient Greek words: “Photo” which means light, and “Graph” which means draw.
What is the definition of a Pascal?
A pascal is a pressure of one newton per square metre, or, in SI base units, one kilogram per metre per second squared. This unit is inconveniently small for many purposes, and the kilopascal (kPa) of 1,000 newtons per square metre is more commonly used.
What is meant by 1 atmosphere?
Standard atmosphere, unit of pressure, equal to the mean atmospheric pressure at sea level. One standard atmosphere, which is also referred to as one atmosphere, is equivalent to 101,325 pascals, or newtons of force per square metre (approximately 14.7 pounds per square inch).
What is the weight of one atmosphere?
about 14.6 pounds per square inch
What is ATM in SI units?
The standard constant value used for atmospheric pressure at sea level is 1 atm (standard atmosphere) which equals 101325 pascals in SI units, and is equivalent to 29.9213 inches of mercury.
What is the full meaning of ATM in physics?
The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). It is approximately equal to Earth’s atmospheric pressure at sea level.
What is the full name of ATM?
An automated teller machine (ATM) is an electronic banking outlet that allows customers to complete basic transactions without the aid of a branch representative or teller.
How is ATM calculated?
1 atm = 760 torr = 760 mmHg. n = number of moles, measured in moles (recall 1 mole = 6.022×1023 molecules), abbreviated mol.
What does mmHg stand for?
millimeters of mercury
What is a good mmHg?
Blood pressure readings are expressed in millimeters of mercury. This unit is abbreviated as mm Hg. A normal reading would be any blood pressure below 120/80 mm Hg and above 90/60 mm Hg in an adult. If you’re in the normal range, no medical intervention is needed.