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NISA [10]
3 years ago
13

A student creates a model of a closed ecosystem by filling a glass tank half full with water then adding 10 snails and two small

aquatic plants the next day all the snails are dead what is the most likely cause of their death
Physics
2 answers:
worty [1.4K]3 years ago
8 0

In any closed ecosystem, if we put some snails and some plants in them, the snails would survive for a while but next day they will die, this is because of the reason that the snails can survive for a while in closed ecosystem but the waste products which takes place in the ecosystem due to both the plants as well as the snails affects the snails due to which they are likely to die soon.

GenaCL600 [577]3 years ago
4 0
The reason why the snails are dead because the snails lack oxygen for it is a model of closed ecosystem. Another reason to this is that they lack  abiotic factors that they need in surviving or as they live for the place that they are living lacks a lot and are not enough for them to last or survive. Lastly, the water could have not been a contributor for them to live for they may not be able to live in a water environment and could only dwell in land.
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Steam enters a well-insulated nozzle at 200 lbf/in.2 , 500F, with a velocity of 200 ft/s and exits at 60 lbf/in.2 with a velocit
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Answer:

386.2^{\circ}F

Explanation:

We are given that

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T_1=500^{\circ}F

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We have to find the exit temperature.

By steady energy flow equation

h_1+v^2_1+Q=h_2+v^2_2

C_pT_1+\frac{P^2_1}{25037}+Q=C_pT_2+\frac{P^2_2}{25037}

1BTU/lb=25037ft^2/s^2

Substitute the values

1\times 500+\frac{(200)^2}{25037}+0=1\times T_2+\frac{(1700)^2}{25037}

500+1.598=T_2+115.4

T_2=500+1.598-115.4

T_2=386.2^{\circ}F

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inna [77]

Answer:

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Explanation:

In order to convert the pressure from atm to millimeters of mercury (mm Hg), we should remind the conversion factor between the two units:

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