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Sphinxa [80]
4 years ago
6

Why might it be important to test one variable at a time when doing an experiment?

Chemistry
1 answer:
Vanyuwa [196]4 years ago
4 0

Answer:

If you change everything at once, you may not know what caused the end result.

Explanation:

If you have Variable A (Salt), Variable B (Potassium), and the Control of Water, you might mix everything together, so you mix salt, potassium and water together. It is known that Potassium reacts very aggressively in water, but since you mixed everything together, you might think that salt+potassium+water goes boom, while it is actually potassium+water=boom.

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JJ Thomson's cathode-ray tube experiment showed which of the following?
Flura [38]
The answer would be D
5 0
3 years ago
Using the formula F=ma, what is the force exerted by a 10 kg bowling ball
Blababa [14]

Answer:

<h2>The answer is 100 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

<h3>Force = mass × acceleration</h3>

From the question

mass = 10 kg

acceleration = 10 m/s²

We have

Force = 10 × 10

We have the final answer as

<h3>100 N</h3>

Hope this helps you

3 0
3 years ago
Please help me!!!
V125BC [204]

Answer:

solid to liquid i think

Explanation:

entropy is natural disorder in simple terms- liquid the atoms are less organised than in a solid to increased entropy as they move apart becoming disordered

at least this is how i understand it

3 0
3 years ago
Is density based on the mass
noname [10]

Answer:

Yes

Explanation:

Density is mass divided by volume

6 0
3 years ago
C. Another radioisotope of americium exists which has an atomic mass of 242.
ollegr [7]

Answer:

1 g  

Explanation:

The half-life of Am-242 (16 h) is the time it takes for half of it to disappear.

We can make a table of the mass left after each half-life.

\begin{array}{cccc}\textbf{No. of} & & \textbf{Percent} & \textbf{Mass}\\\textbf{Half-lives} & \textbf{Time/h} & \textbf{Remaining} & \textbf{Remaining/g}\\0& 0 & 100 & 8\\1 & 16 &50 & 4\\2 & 32 & 25 & 2\\3 & 48 & 12.5 & 1\\4 & 64 & 6.25 & 0.5\\\end{array}

The mass remaining after 48 h  is 1 g.

7 0
4 years ago
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