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RideAnS [48]
4 years ago
8

Which is an example of a chemical reaction ?

Physics
2 answers:
julia-pushkina [17]4 years ago
8 0

Answer:

paper burned and turned into smoke...

Explanation:

When a chemical reaction has taken place that means that whatever the starting variable is, (in this case it was the paper) then it cannot go back to its original state... you can also tell if a chemical reaction has taken place if the test releases any kind of gas, if there is a temperature change, or if there is a color change. Which this time it changed from paper into smoke which is a gas

Hope This Helps

enot [183]4 years ago
4 0

Answer:

paper burned and turned into smoke

Explanation:

Because it changes how i looks and the chemichals change.

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Large numbers of ribosomes are present in cells that specialize in producing which molecules?
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Answer:

Protein molecules

Explanation:

Ribosomes are the cell organelles that are responsible for the synthesis of protein in the cell. Proteins are the fundamental building blocks and help in repair and damage of cell in the body.

Ribosome is a complex which is made up of protein and RNA. Ribosomes can be found floating within the cytoplasm or attached to the endoplasmic reticulum.

7 0
4 years ago
9) An electrical appliance has a resistance of 25 N. When this electrical ap-
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(C)

Explanation:

From Ohm's law,

V = IR

Solving for I,

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6 0
3 years ago
"how long would it take for a ball dropped from the top of a 400-foot building to hit the ground? round your answer to two decim
Lelechka [254]
Hello

Let's convert first the height from foot to meters:
S=400~ft=121.92~m
This is the space covered by the ball in its accelerated motion, where the acceleration is the gravitational acceleration:
a=g=9.81~m/s^2
The law of motion is given by
S= \frac{1}{2}at^2
Re-arranging, we can get the total time of the motion:
t= \sqrt{ \frac{2S}{a} }=4.99~s

which is the time the ball takes to hit the ground.
7 0
3 years ago
Read 2 more answers
What are the two forces acting on the upper magnet?
solniwko [45]

Answer:

b

Explanation:

I'm not so sure but it makes sense

8 0
3 years ago
In 2.5 S, a Car increases its speed from 20.0m/s to 25.0 m/s what is the acceleration of the car​
Dima020 [189]

Answer:

2 m/s

Explanation:

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