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Taya2010 [7]
2 years ago
7

Can someone help me with this thanks​

Biology
1 answer:
Varvara68 [4.7K]2 years ago
6 0

Answer:

You're right its C. There will be no transfer of heat from the nickel to the water in the glass.

I hope this answers your question(s). Have a good weekend!

:)

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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
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 process of cellular respiration
larisa [96]

Answer:Breaks down food molecules to release stored energy

Explanation:

8 0
3 years ago
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Which is true of the population shown in this graph? A. It shows the effect of overpopulation on a species. B. The number of ind
denpristay [2]

The answer to this is C.

8 0
3 years ago
What safeguards must society adopt to handle the rapid advances in biotechnology
Artist 52 [7]

The benefits of the biotechnological researches posses the same level of threat if they are not regulated. It is essential to set some ethical guidelines to prevent the misuse of the biotechnological researches. the genetically altered organisms posses a harm to the environment if they are mixed with the natural occurring ones. Moreover, the super pathogens and drugs can cause a catastrophe if not handled properly, and can be used in bio-terrorism. Hence, it is essential to follow the rules and take in notice the ethical concerns.

3 0
3 years ago
In a population of rabbits, there are 496 black rabbits and 27 white rabbits. Fur color is determined by a pair of alleles where
Troyanec [42]

Answer:

0.96

Explanation:

It is given that

B is the dominant allele which represents the black color

and b is the recessive allele which represents the white fur.

B being dominant will result into black color fur for genotype "Bb"

Given -

Frequency of black fur allele (p) is 0.8

As per Hardy Weinberg's  first law of equilibrium

p + q = 1\\

Substituting the value of p in above equation, we get -

q = 1-p\\q = 1-0.8\\q= 0.2

q represents the frequency for white fur allele

Frequency of white fur phenotype is

q^2\\= 0.2^2\\= 0.04

Frequency of homozygous black fur phenotype (BB) is

p^2\\= 0.8^2\\= 0.64

As per Hardy Weinberg's second law of equilibrium -

p^2 + q^2 + 2pq = 1\\0.64 + 0.04 + 2pq = 1\\2pq = 1 - 0.68\\2pq = 0.32\\

Combined frequency of homozygous and heterozygous black fur phenotype is

0.64 + 0.32\\= 0.96

5 0
3 years ago
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