Physics, 02.12.2020 23:00 shacarabrown49
Carey crumpled a wad of paper and placed it in a large
glass jar. He recorded the total mass of the jar (including
the air in the jar), the paper, the lid, and a match.
Carey lit the match, quickly put it in the jar, and sealed
the lid. Most of the paper burned. He saw smoke in the jar
and black ashes left from the paper.
Which sentence best describes the total mass of the jar,
lid, paper, and match before burning compared with the
total mass after burning?
A The total mass after burning is greater.
B The total mass after burning is less.
C The total mass before and after burning is the same.
Answers: 1
Physics, 22.06.2019 00:00, madskate9993
During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.
Answers: 1
Physics, 22.06.2019 04:30, MadisonUpky9652
Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons
Answers: 2
Physics, 22.06.2019 16:00, StayPuftMarshadowMan
Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation
Answers: 2
Carey crumpled a wad of paper and placed it in a large
glass jar. He recorded the total mass of the...
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