Physics, 19.02.2021 08:20 heavenwagner
Two children are at opposite ends of an aluminium rod. One strikes the end of
the rod with a stone. Find the ratio of times taken by the sound-wave in air and
in aluminium to reach the second child. (Take velocity of sound in aluminium as
6420 m s-1 and in air as 346 m s- at 25°C.)​
Answers: 2
Physics, 22.06.2019 12:00
Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value
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Physics, 22.06.2019 14:30
Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?
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Physics, 22.06.2019 21:00
What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.
Answers: 1
Physics, 22.06.2019 21:30
Which are causes of mechanical weathering? (check all that apply) a. acid rain b. plant growth c. animal actions d. carbon dioxide e. pressure release i chose b & e and got the question wrong.
Answers: 2
Two children are at opposite ends of an aluminium rod. One strikes the end of
the rod with a stone....
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