If a physical change has taken place, which of these is most likely true?
Group of answer choices
A permanent change has taken place.
The changed substance retains its unique properties.
Atoms rearrange to form a new substance.
The molecular composition of a substance changes.
Answers: 3
Physics, 22.06.2019 13:30, kuddlebugsmommy
The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?
Answers: 1
Physics, 22.06.2019 15:50, rosepetals2938
If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?
Answers: 1
Physics, 23.06.2019 09:00, idk4643
Auniform electric field exists in the region between two oppositely charged plane parallel plates separated by a distance of 1.60 cm . a proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time interval of 3.20Ć10-6 s. 1-find the magnitude of the electric field. use 1.60Ć10-19c for the magnitude of the charge on an electron and 1.67Ć10-27kg for the mass of a proton 2-find the speed of the proton when it strikes the negatively charged plate
Answers: 1
If a physical change has taken place, which of these is most likely true?
Group of answer choices
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01
Computers and Technology, 05.10.2019 09:01