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3 years ago

14

Discuss how the gradualist model of evolution differs from the punctuated equilibrium model of evolution

1 answer:

dem82 [27]3 years ago

8 0

<span>Gradualism is something as the name suggests a process that happens with time. So the it is the process through which one species turns in to other or a new species whereas punctuated equilibrium is the model of evolution which is more abrupt and more sudden. The changes within the species happen more when unexpected in the punctuated process.</span>

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Which of the following is the best definition of a closed system?

lisov135 [29]

The answer is either

b A system in which Newton's Laws are valid

or

c A system in which there are no external forces.

Explanation:

not a, and not d

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A closed system obeys the conservation laws in its physical description.

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3 years ago

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Answer:

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m_a_m_a [10]

Gas because liquids and solids volumes don't change from switching containers.

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olga55 [171]

Answer:

7.5J

Explanation:

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3 years ago

A certain type of laser emits light that has a frequency of 4.2 × 1014 Hz. The light, however, occurs as a series of short pulse

bogdanovich [222]

Explanation:

It is given that,

Frequency of the laser light, $f=4.2\times 10^{14}\ Hz$

Time, $t=3.2\times 10^{-11}\ s$

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$\lambda=\dfrac{c}{f}$

$\lambda=\dfrac{3\times 10^8}{4.2\times 10^{14}}$

$\lambda=7.14\times 10^{-7}\ m$

or

$\lambda=714\ nm$

(b) Let n is the number of the wavelengths in one pulse. It can be calculated as :

$n=f\times t$

$n=4.2\times 10^{14}\times 3.2\times 10^{-11}$

n = 13440

Hence, this is the required solution.

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2 years ago