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3 years ago

The digestive system is a group of organs working together to...

1 answer:

Alex3 years ago

6 0

The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. Food passes through a long tube inside the body known as the alimentary canal or the gastrointestinal tract

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Solve B in a complete combustion pleaseee

never [62]

Answer:

2 C2H2 + 5 O ---> 4 CO2 + 2 H2O

Explanation:

combustion reactions always end with CO2 + H2O

and you can use this website to balance out equations when you're stuck

https://en.intl.chemicalaid.com/tools/equationbalancer.php?equation=C2H2+%2B+O2+%3D+CO2+%2B+H2O

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2 years ago

What is competitive exclusion?<br> This is for a lesson about Niche

Igoryamba

Answer:

the inevitable elimination from a habitat of one of two different species with identical needs for resources.

Explanation:

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3 years ago

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The half-life of a positron is very short. It reacts with an electron, and the masses of both are converted to two gamma-ray pho

sp2606 [1]

Explanation:

(a) It is known that relation between energy and mass is as follows.

$E = 2 \times mc^{2}$

where, E = energy

m = mass

c = speed of light = $3 \times 10^{8}$ m/s

As it is given that mass is $9.109 \times 10^{-31}$ kg. So, putting the given values into the above formula as follows.

$E = 2 \times mc^{2}$

= $2 \times 9.109 \times 10^{-31} kg \times 3 \times 10^{8}m/s$

= $1.638 \times 10^{-13} J$

Therefore, we can conclude that the energy produced by the reaction between one electron and one positron is $1.638 \times 10^{-13} J$ .

(b) When gamma ray photons are produced then they will have the same frequency. Relation between energy and frequency is as follows.

E = $h \times \nu$ ..... (1)

where, h = plank's constant = $6.626 \times 10^{-34} J.s$

$\nu$ = frequency

Also, $E = 2 \times mc^{2}$ ........ (2)

Hence, equating equations (1) and (2) as follows.

$h \times \nu$ = $2 \times mc^{2}$

So,

$6.626 \times 10^{-34} Js \times \nu$ = $1.638 \times 10^{-13} J$

$\nu$ = $1.236 \times 10^{20} Hz$

Thus, we can conclude that the frequency is $1.236 \times 10^{20} Hz$ .

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3 years ago

How does the study of science benefit society

svet-max [94.6K]

1.Use of contraceptives help the members of the society to control population.
2.By advancing the way of development in society.
3.Brings a kind of practical thoughts in the pendulianers...

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3 years ago

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How to separate iron rich particles from grains of table salt

mafiozo [28]

With a magnetic unless it has been heated to the Curie point or the Curie temperature then you are out of luck

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3 years ago