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3 years ago

Help plssss?!!!!!!!!!

Biology

1 answer:

slavikrds [6]3 years ago

7 0

Answer:

frameshift

Explanation:

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An owl has good night vision because its eyes can detect a light intensity as small as 5.0 × 10-13 W/m2. What is the minimum num

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Answer:

Thus, the minimum number of photons per second is 77.34

Explanation:

Light intensity, $I_{min}$ = $5\times 10^{-13} W/m^{2}$

Pupil has a diameter, d = 8.5 mm

= 8.5 x $10^{-3}$ m

Radius of the eye, r = 4.25 x $10^{-3}$ m

∴ Area of the eye, A = $\pi .r^{2}$

= $3.14\times \left ( 4.25\times 10^{-3} \right )^{2}$

= $5.6\times 10^{-5} m^{2}$

Let $P_{min}$ be the minimum number of photons.

Therefore, $P_{min}$ = $I_{min}$ x A

= $5\times 10^{-13}$ x $5.6\times 10^{-5}$

= $2.8\times 10^{-17}$ W

Thus the minimum number of photons is given by

$N_{min}=P_{min}/E$

where E = $hc/\lambda$

= $\left (6.63\times 10^{-34}\times 3\times 10^{8} \right )/548\times 10^{-9}$

= $3.62\times 10^{-19} J$

Therefore, $N_{min}$ = $\frac{2.8\times 10^{-17}}{3.62\times 10^{-19}}$

= 77.34 photons per second

Thus, the minimum number of photons per second is 77.34

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3 years ago

What is responsible for the cohesive property of water

yan [13]

Answer: Hydrogen bonds.

Explanation: This seems like more of a chemistry question, but basically hydrogen bonding is way stronger than any other kinds of bonding, and because water molecules are all hydrogen bonded, they cling together a bunch and are thus super cohesive.

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1 year ago

Global winds are directly caused by the Earth's rotation and ____

Artemon [7]

<h2>Answer:</h2>

(D)

<h2>Explanation:</h2>

The uneven heating of the Earth’s surface heats up the air which stirs up air currents in the atmosphere Ex. Jet streams, Easterly, Westerly winds.

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Allosteric inhibition can be reversed.

The allosteric inhibitor binds to a site distinct from the active site resulting in decreased affinity of the enzyme for the substrate.

Allosteric inhibition can be irreversible

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How many variables should be manipulated in a controlled experiment?

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Two the independent and dependent

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