3 years ago

What is special about decomposers? *

Physics

1 answer:

Bogdan [553]3 years ago

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D. They are heterotrophs that digest food internally.

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Carbon is allowed to diffuse through a steel plate 15 mm thick. The concentrations of carbon at the two faces are 0.65 and 0.30

beks73 [17]

Answer:

T=575.16K

Explanation:

To solve the problem we proceed to use the 1 law of diffusion of flow,

Here,

$J=-D\frac{\Delta C}{\Delta x}$

$\Delta C$ is the rate in concentration

$\Delta x$ is the rate in thickness

D is the diffusion coefficient, where,

$D= D_0 exp(\frac{Q_d}{RT})$

Replacing D in the first law,

$J=-(D_0 exp(\frac{-Q_D}{RT}))\frac{\Delta }{\Delta x}$

clearing T,

$T=\frac{Q_d}{R*ln(\frac{J*\Delta x}{D_0*\Delta C})}$

Replacing our values

$T=-\frac{80000}{8.31*ln(\frac{(6.2*10^{-7})(-15*10^{-3})}{(1.43*10^{-9})(0.65-0.30)})}$

$T=-\frac{80000}{-138.09}$

$T=575.16K$

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3 years ago

An embolus can cause which of the following?

QveST [7]

I think it’s C. Stroke if not then D

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3 years ago

A skateboarder with a mass of 60 kg moves with a force of 20 N. What is her acceleration?

Zanzabum

Explanation:

Solution,

Mass(m)= 60 kg
Force (F)= 20 N
Acceleration (a)= ?

We know that,

F=ma
a=F/m
a=20/60
a=0.333 m/s²

So, her acceleration is 0.333 m/s².

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Which statements about electric field lines are correct? Check all that apply.

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They point towards a negative charge.
They point away from a positive charge.
They never cross.

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