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3 years ago

A clear object inside the eye that focuses light on the retina

2 answers:

8 0

The lens is transparent, flexible its located behind the iris and the pupil its the second part of your eye after the cornea

Pachacha [2.7K]3 years ago

7 0

The answer you need is the LENS, it helps your eyes focus. i really hope this helps!

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A certain first-order reaction a â†’ b is 25% complete in 42 min at 25Â°c. What is the half-life of the reaction?

yan [13]

Answer:

$t_{\frac{1}{2}} = 101.16$ minutes

Explanation:

For a First order reaction, the rate constant is determined by

$k = \frac{2.303}{t} log \frac{a}{a-x}$

Where

k= rate constant

t= time required for a reaction

a= initial concentration

x= amount of reactant decomposed in time t

a-x= amount of reactant left after time t

Let the initial concentration be $100$

Then

$x = 25\\a-x = 75$

Substituting the given values in above equation, we get -

$k = \frac{2.303}{42} log \frac{100}{75} \\$

$k = 6.85 *10^{-3}$

Also,

$k = \frac{0.693}{t_{\frac{1}{2}} } \\t_{\frac{1}{2}} = \frac{0.693}{6.85 *10^{-3}}\\$

$t_{\frac{1}{2}} = 101.16$ minutes

Read more on Brainly.in - https://brainly.in/question/6804668#readmore

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4 years ago

Which of these terms describes both carbohydrates and protein?

anyanavicka [17]

Its definitely lipids lol

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3 years ago

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Solnce55 [7]

it is c Object B, by 1 grams per cubic centimeter.

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4 years ago

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________ developed a scheme of classifying symptoms into discrete disorders that is the basis for our modern classification syst

Tanya [424]

Emil Kraeplin developer the system that is the foundation for our modern classification system

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4 years ago

Of the different sources of genetic variability, which one causes the variation in the combinations of homologs from paternal an

AlexFokin [52]

Answer:

Crossing over.

Explanation:

Crossing over may be defined as the phenomena of exchange of the genetic material between the non- sister chromatids of the homologous chromosomes. The crossing over occurs at the pachytene stage.

The crossing over may provide a source of genetic variation as it can create variation in the homologs of paternal and maternal lineage, present within a haploid cell. This crossing over occurs during the process of synapsis.

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4 years ago