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3 years ago

Explain whyusedwhy composite samples

Physics

1 answer:

asambeis [7]3 years ago

4 0

Answer:

samples are combined, thoroughly homogenized, and treated as a single sample. Composite sampling can improve spatial or temporal coverage of an area without increasing sample number. Appropriateness of composite sampling is dependent upon the sampling objectives and the site characteristics.

Explanation:

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My Notes A container is divided into two equal compartments by a partition. One compartment is initially filled with helium at a

Ostrovityanka [42]

Answer:

$final-temperature = T_{f} = 252.51K$

Explanation:

we can solve this problem by using the first law of thermodynamics.

$\Delta U= Q-W$

Q= heat added

U= internal energy

W= work done by system

$E_{final}= E_{initial}$

$C_{v}(N_{2})=1.04\frac{KJ}{Kg K}$

$C_{v}(He)=5.193\frac{KJ}{Kg K}$

now

From equation 1

$T_{f}=\frac{C_{v}( N_{2}) T_{N_{2} } C_{v} (He) T_{He}}{C_{v} (N_{2}) C_{v}(He)}$

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$T_{f} = 252.51K$

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4 years ago

What are the two forces acting on the upper magnet?

solniwko [45]

Answer:

Explanation:

I'm not so sure but it makes sense

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3 years ago

A sound wave is made of a series of compressions and

Gre4nikov [31]

I would say vibrations, but is there choices?

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Megan was doing time trials on her bike around a 400m horizontal track. She took 32 seconds to travel 400m. What was her average

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Three identical resistors are connected in parallel to a battery. If the current of 12. A flows from the battery, how much curre

Doss [256]

Answer:

4 A

Explanation:

We are given that

$R_1=R_2=R_3=4\Omega$

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We have to find the current flowing through each resistor.

We know that in parallel combination current flowing through different resistors are different and potential difference across each resistor is same.

Formula :

$\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}$