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3 years ago

Which substance is a gas at 20˚C and one atmosphere of pressure? A. C B. O3 C. Ca D. I2

Chemistry

1 answer:

jasenka [17]3 years ago

3 0

Answer:

Explanation:

The answer to the question is O3 .

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True or false, cilia and mucus help keep our lungs clean and healthy?

fiasKO [112]

Answer:

It does. They trap particles so they don’t enter.

Explanation:

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3 years ago

1 loop in the primary coil and 8 loops in the secondary. If the secondary voltage is 120 V, what must be the primary voltage

Jet001 [13]

Answer:

$V_{p} = 15 V$

Explanation:

<u>Given the following data;</u>

Number of loops in primary coil, Np = 1 loop.

Number of loops in secondary coil, Ns = 8 loops

Voltage in secondary coil, Vs = 120V

To find the voltage in the primary coil, Vp;

Transformer ratio is given by the formula;

$\frac{V_{p}}{V_{s}} = \frac{N_{p}}{N_{s}}$

Making Vp the subject of formula;

$V_{p} = \frac{N_{p}}{N_{s}} * V_{s}$

Substituting into the equation, we have;

$V_{p} = \frac{1}{8} * 120$

$V_{p} = \frac{120}{8}$

$V_{p} = 15 V$

Therefore, the voltage in the primary coil, Vp is 15 Volts.

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2 years ago

When there are more electrons than protons an object has an overall<br> charge.

azamat

Answer:it would have a negative charge because electrons are negative

Explanation:

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3 years ago

In some developing nations, the percentage of animal protein from fish in the diet can be as high as _____.

Makovka662 [10]

Answer:

20%

Explanation:

The fish consumption has had lot of variations in the past few centuries, most noticeably in the last century. Initially it was the richer countries that had population which was consuming the most animal protein from fish in the world, while the developing nations had less. Things have changed though, especially during the 1990's, when the developing nations experienced a rapid increase in the consumption of fish. This was largely due to the growing standard and the availability of fish, so in some of the developing nations the percentage of animal protein from fish reached around 20%.

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3 years ago

A student places three ice cubes in a beaker and allows them to partially melt. if she measures the temperature of the water in

atroni [7]

She will most likely observe that the temperature does not change during melting because the heat absorbed is used to overcome intermolecular forces rather than to increase the kinetic energy of the particles if she measures the temperature of the water in the beaker.

8 0

3 years ago

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