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blondinia [14]
3 years ago
9

All of the fallowing are possible sources of error in a scientific investigation exept for

Physics
1 answer:
Whitepunk [10]3 years ago
6 0

c adding research resources during an investigation

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If the atomic number of an atom is 4 and the mass number is 9, then how many electrons does it have
miskamm [114]
The atomic number of an atom says how many protons it has. This number cant change, since the atomic number is what gives elements their identities (in the periodic table, at least).
The mass number, on the other hand, says how many protons AND neutrons the atom has (so, the sum of P+ and N0). So, electrons have nothing to do with this number.
Atoms are neutrally charged, which means there has to be an equal number of positive and negative particles. The negative particles of an atom are its electrons, and since our atom has 4 protons, it must also have 4 electrons.
5 0
3 years ago
The air inside a balloon exerts a force of 1.5 n on an area of 0.5 m^2. what is the pressure inside the balloon?
maxonik [38]
Pressure=force/area
1.5/0.5=3Pa
4 0
3 years ago
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Gravity has traditionally been defined as a force of attraction between things that have what
ludmilkaskok [199]

Answer:

mass

Explanation:

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The simplest form of a substance
likoan [24]
Answer :

C) Atom

Actual answer should be element but depends on the way you interpret the question and the options given to answer it

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Atom is the most basic unit of any substance and is what molecules are made of.

Hope it helps if it does let me know by thanking
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While trying out for the position of pitcher on your high school baseball team, you throw a fastball at 87.6 mi/h toward home pl
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