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3 years ago

Can you help me with this question?

Biology

1 answer:

netineya [11]2 years ago

6 0

Answer:

can you shoot it better because it is quite blurry

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This food web represents a community along the coast of Alaska.

jeyben [28]

Answer:

Oh wow thats cool...... you can just look it up on the internet. There are the most amazing tricks and things on there.

5 0

3 years ago

List at least 10 ways to maintain health care at home / community.

arlik [135]

Answer:

Eat a healthy diet

Consume less salt and sugar.

Reduce intake of harmful fats.

Avoid harmful use of alcohol.

Don't smoke.

Be active.

Check your blood pressure regularly.

Get tested

Explanation:

hope it will help you

8 0

2 years ago

Which of these describes a population?

Vesna [10]

The answer is "<span>B: all the gray squirrels that live in a forest" </span>

6 0

3 years ago

Read 2 more answers

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

Lady bird [3.3K]

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

4 0

3 years ago

The hormone _____ appears to be designed, from an evolutionary standpoint, to protect the body against weight loss. question 9 o

babunello [35]

Leptin hormone is the hormones which appears to be designed to protect the body against weight loss.
Leptin hormone is secreted from fat cells and it helps to regulate body weight. Leptin hormone is predominantly made by adipose cell that help to regulate energy balance by inhibiting hunger. leptin hormone is opposed by the action of the ghrelin hormone which is a hunger hormone/

3 0

3 years ago