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sergey [27]
3 years ago
6

One type of cold remedy is an effervescent tablet that breaks down in water. When the tablet is placed in water, it forms gas bu

bbles. In this example, the formation of a gas
A is a physical property.
B occurs when adding water to acid.
Cis a sign of a chemical change.
D occurs when the water boils.
Physics
2 answers:
oksano4ka [1.4K]3 years ago
7 0

Answer:

is a sign of a chemical change

Explanation:

The tablet reacts with the water to form carbon dioxide

wariber [46]3 years ago
6 0
I think it’s C is a sign of a chemical change.
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What is the correct classification of a mixture in which both a solid and a liquid are visible?
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snow_tiger [21]

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Two +1 C charges are separated by 30000 m, what is the magnitude of<br> the force?
Kipish [7]

Answer:

<em>The magnitude of the force is 10 N</em>

Explanation:

<u>Coulomb's Law</u>

The electrostatic force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between the two objects.

Written as a formula:

\displaystyle F=k\frac{q_1q_2}{d^2}

Where:

k=9\cdot 10^9\ N.m^2/c^2

q1, q2 = the objects' charge

d= The distance between the objects

We have two identical charges of q1=q2=1 c separated by d=30000 m, thus the magnitude of the force is:

\displaystyle F=9\cdot 10^9\frac{1*1}{30000^2}

\displaystyle F=9\cdot 10^9\frac{1*1}{30000^2}

F = 10 N

The magnitude of the force is 10 N

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Answer:

0.000234 seconds

Explanation:

Since the row is 0.15m, its radius of rotation must be 0.15 / 2 = 0.075 m

We can start by calculating the angular speed of the rod:

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The number of seconds per revolution, or period, is the inverse:

1/4265 = 0.000234 seconds

3 0
3 years ago
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