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2 years ago

Asssap will give 100 poits

Biology

2 answers:

adoni [48]2 years ago

7 0

Answer:

You have to believe the exercise works before you try it

Explanation:

777dan777 [17]2 years ago

5 0

Answer:

"You have to believe the exercise works before you try it" would be the pseudoscientific claim.

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Seasons are caused by ?

NikAS [45]

Answer:

Explanation:The seasons are caused as the Earth, tilted on its axis, travels in a loop around the Sun each year. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun.

3 0

3 years ago

Read 2 more answers

Leo does an experiment to determine which laundry detergent removes grass

nlexa [21]

Answer:

Explanation:

The answer to his question (which detergent is best) is that the one that removed all stains was the best.

6 0

3 years ago

Which nutrients do plants need in larger quantities?<br> micronutrients<br> or<br> macronutrients

SCORPION-xisa [38]

Answer:

macronutrients

Explanation:

macronutrients are important for growing plants. the main macronutrients are nitrogen, Potassium, and phosphorus.

6 0

3 years ago

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

Leaves are important plant structures because they

ra1l [238]

The answer is c. Inside leaves, there's a lot of chloroplast, which contains chlorophyll for photosynthesis. This can make energy.

4 0

3 years ago