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3 years ago

In your own words, explain why the Linnaean system has changed over time pls help

1 answer:

8 0

Classification systems are mental models that we create to make sorting things simpler and more efficient. We make compromises to emphasize certain details and hide others based on their perceived relevance to achieving the outcomes we seek. Even if the original model was nearly perfect, you should expect the inputs provided and outcomes desired to change as time goes by.

In time, we usually find that we have over-simplified by ignoring important details. Mental models such as classification systems should evolve over time. This enables them to more accurately reflect reality and lead to the outcomes we seek.

You can only find the details you seek by observing the right layer of abstraction.

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(b) Ozone absorbs radiation of wavelengths 2200–2900 Å, thus protecting organisms from this radiation. Find the frequency and en

GrogVix [38]

The frequency and energy of most energetic of these photons is $1.36*10^{15}$ Hz and $9.04*10^{-19}$ J respectively.

The high energy photons will have least wavelength. Taking the given less wavelength for calculation of frequency and energy of photons.

λ = 2200 Å

Also, we know, 1 Å = $10^{-10}$ m

So, λ = $2200*10^{-10}$

λ = $2.2*10^{-7}$ <em> </em>m

Now, calculating frequency using the formula -

c = fλ, where c is speed of light, f is frequency and λ is wavelength.

We know, c = $3*10^{8}$ m/s

f = c/λ

f = $\frac{3*10^{8} }{2.2*10^{-7} }$

frequency = $1.36*10^{15}$ Hz

Now, calculating Energy through the formula -

E = hf, where E is energy, h is planck's constant and f is frequency

Value of planck's constant = $6.63*10^{-34}$ Js

E = $6.63*10^{-34}$ * $1.36*10^{15}$

Energy = $9.04*10^{-19}$ J

Thus, frequency and energy of photons is $1.36*10^{15}$ Hz and $9.04*10^{-19}$ J respectively.

Learn more about energy of photon -

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3 0

1 year ago

What is the molarity of a solution containing 400 g cuso4 in 4. 00 l of solution?.

Umnica [9.8K]

Answer:

This 2.5061243 moles is in 4 liters.

3 0

2 years ago

If the energy of the reactants is less than

expeople1 [14]

The opposite type of reaction (where energy is taken in from the surroundings of a reaction and thus the energy of the reactants is lower than that of the products) is called an endothermic reaction

7 0

2 years ago

Consider this reaction:2HI(g) ------> H2(g) + I2(g)At a certain temperature it obeys this rate law.rate = (8.74 x 10^-4s^-1)

nasty-shy [4]

Answer:

0.1440M

Explanation:

Let''s bring out the parameters we were given;

Rate constant = 8.74 x 10^-4s^-1

Initial Concentration [A]o = 0.330M

Final concentration [A]= ?

Time = 800s

The reaction is a first order reaction, due to the unit of the rate constant. In first order reactions, the reaction rate is directly proportional to the reactant concentration and the units of first order rate constants are 1/sec.

Formular relating these parameters is given as;

ln[A] = ln[A]o − kt

Making [A] subject of interest, we have;

ln[A] = ln[A]o − kt

ln[A] = ln(0.330) - ( 8.74 x 10^-4 * 800)

In[A] = - 1.1086 - (6992 x 10^-4)

ln[A] = -1.8079

[A] = 0.1440M

8 0

3 years ago

What information is provides by the mass number A, which is the superscript in the atomic symbol?

fredd [130]

Answer:

The mass number tells us the number (the sum of nucleons) of protons and neutrons in the nucleus of an atom.

Explanation:

6 0

4 years ago