Chemistry Middle School

who invented the re-breathers for the fire fighters?

Answers

Answer 1

Answer: Pierre Aimable De Saint Simon Sicard

Explanation:

A prototype rebreather was built in 1849 by Pierre Aimable De Saint Simon Sicard.  It had a large back mounted oxygen tank with working pressure of about 13.3 bar, and two scrubbers containing sponges soaked in a caustic soda solution

Related Questions

A(n) _________ light bulb uses the most energy and is not good to use for conserving energy.

1.incandescent
2.LED
3.CFL

Answers

LED light bulb is more energy efficient than CFL bulb simply because they are based on better technology. LED light bulbs use much lesser energy in comparison to the traditional technology.

"Working on rigs is dangerous due to explosions and weather"
To which energy type does this apply to?

Answers

using oil as energy
Hope this helps!:)
This would apply to when you’re using oil energy

Who created the first compound microscope and telescope?

Answers

Answer:

Janssen

Explanation:

Answer:

Hans Martens/Zacharias Janssen

Explanation:

Janssen was the son of a spectacle maker named Hans Janssen, in Middleburg, Holland, and while Zacharias is credited with inventing the compound microscope, most historians surmise that his father must have played a vital role, since Zacharias was still in his teens in the 1590s.

a) week 1

b) week 2

c) week 3

d) week 4

Answers

Try c I think is the most accurate one
Yea it would be c because it grapes for you so now it wants you to find the weeks of the plant that need to be soiled

Please help me with this I will give out extra points with the brain thing if you help me with this science question 3/5 image below. I promise

Answers

Answer:

A) 200 m/s2

Explanation:

Force is the push or pulls on an object with mass that causes it to change velocity or to accelerate.

Force represents a vector, which means it has both magnitude and direction.

Given:

Mass of metal ball = 0.025 kg

Force = 5 N

To Find:

Acceleration, = ?

Solution:

Formula:

answer is 200 m/s2 lol

What is true about matter?

A.
Matter has mass and takes up space.

B.
Matter has mass but does not take up space.

C.
Matter takes up space but does not have mass.

D.
Matter does not have mass or take up space.

Answers

Answer:

A). mateer has mass and takes place

Answer:

Explanation: Its c

How did James West impact their field? How would things be different in science today if James West had not accomplished what they did?

Answers

Hey~ Hope this helps!

{p.s this is hand-written not copied and pasted. Use freely}

Answer:

James West impacted his field in an abundance of ways. For example, West and Sessler are credited as the inventors of the “foil electret microphone”. Without the creation of this compact microphone over 90 percent of all contemporary microphones – which includes those found in telephones, tape records, baby monitors and hearing aids would cease to exist today.

What coefficient should be used to make the following equation balanced? N2+O2--> _NO

Answers

                 ║∧║······→Hello.←······║∧║

                                          Your answer should be:

                                                N2 + O2 → 2NO

····················································································

I hope this answered your question!

Thanks for spending time reading this :)

(A brainliest would be appreciated!)

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The coefficient used to make the following equation balanced: N2 + O2 → NO is 2.

BALANCING EQUATION:

Balancing an equation means ensuring that each atom of an element on both sides of an equation.

To balance an equation, coefficients, which are numbers placed in front of the elements, are used.

According to this question, the following equation is given:

N2 + O2 → NO

To balance the equation, we make use of coefficient 2 in front of nitrogen oxide (NO) as follows:

N2 + O2 → 2NO

Learn more at: https://brainly.com/question/11322377?referrer=searchResults

Scientific laws differ from scientific theories because laws do not provide
A)
a hypothesis.
B)
a description
C)
an explanation
D)
a statement.

Answers

A) a hypothesis hope it helped :)

QUCKLY PLEASE!! what is a biogeochemical cycle? ​

Answers

It is 4 a process that recycles elements and other matter through the biosphere
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