Which of the following is a physical change?
A. a newspaper burns when placed in a fire.
B. a...
Physics, 27.07.2020 07:01 Kadancepiggott7
Which of the following is a physical change?
A. a newspaper burns when placed in a fire.
B. an iron chair rusts when left outside
C. a sample of water boils and releases gas.
D. a plant changes carbon dioxide and water into sugar
Answers: 2
Physics, 22.06.2019 05:30
An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?
Answers: 2
Physics, 22.06.2019 18:00
Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?
Answers: 2
Physics, 23.06.2019 08:00
Which of these best describes the term ecliptic? a. the circle where "earth meets the sky" b. the change in azimuth and altitude of an object c. the point directly above the geographic north pole d. the path of the sun through the constellations of the zodiac
Answers: 2
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