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3 years ago

Why is copper a pure substance? A. Because it is an element B. Because it is a compound C. Because it is a homogenous mixture

Physics

1 answer:

expeople1 [14]3 years ago

3 0

A) because it is an element.
Explanation: usually when they say pure substance they mean pure element.
Hope this helped!! :)

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Collapse question part Part 4 (d) What is the unit vector in the direction of the spacecraft's velocity? (Express your answer in

Maksim231197 [3]

Answer:

unit (v) = [ -0.199 i - 0.8955 j + 0.39801 k ]

Explanation:

Given:

v = (-23.2, -104.4, 46.4) m/s

Above expression describes spacecraft's velocity vector v.

Find:

Find unit vector in the direction of spacecraft velocity v.

Solution:

Step 1: Compute magnitude of velocity vector.

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mag (v) = 116.58 m/s

Step 2: Compute unit vector unit (v)

unit (v) = vec (v) / mag (v)

unit (v) = [ -23.2 i -104.4 j + 46.4 k ] / 116.58

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3 years ago

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The gauge pressure inside an alveolus with a 200 µm radius is 25 mmHg, while the blood pressure outside is only 10 mmHg. Assumin

alekssr [168]

Answer:

The surface tension is 0.0318 N/m and is sufficiently less than the surface tension of the water.

Solution:

As per the question:

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Now,

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3 years ago

Why is copper a pure substance? A. Because it is an element B. Because it is a compound C. Because it is a homogenous mixture​

Why is copper a pure substance? A. Because it is an element B. Because it is a compound C. Because it is a homogenous mixture