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3 years ago

In order for generators to work, this type of

Physics

2 answers:

Ymorist [56]3 years ago

8 0

In order for generators to work, mechanical energy must be harvested. (C)

Ksju [112]3 years ago

4 0

D need electrical energy

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5N of force is applied to move a large nail a distance of 10 cm from an electromagnet on a frictionless table. The nail is then

DedPeter [7]

Answer:

C) The rate of change from potential to kinetic energy is exponential.

Explanation:

As we know that total mechanical energy must be conserved here

As we know that there is no friction force on this system of electromagnet and nail

So here we can say that that

Magnetic potential energy of the nail + electromagnet system will convert into kinetic energy of the nail as it is released.

So we will have

Initial potential energy = work done to move it away by 10 cm

$U = 5(0.10)$

$U = 0.5 J$

now as the nail is released then this potential energy will start to convert into kinetic energy

So here correct answer must be

C) The rate of change from potential to kinetic energy is exponential.

7 0

3 years ago

A vacuum gage attached to a power plant condenser gives a reading of 27.86 in. of mercury. The surrounding atmospheric pressure

Nadusha1986 [10]

Answer:

absolute pressure = 1.07 lbft/in^2

Explanation:

given data:

vaccum gauge reading h = 27.86 inch = 2.32 ft

we know that

gauge pressure p is given as

$p = \rho gh$

$p = 848 \ lb/ft^3 * 32 \ ft/s^2 *2.32 ft = 62955.52 \ lbft/s^2 * 1/ft^2$

we know that $1\ lb ft\s^2 = \frac{1}{32.174}\ lbft$

1 ft = 12 inch

therefore $p = 62955.52 * \frac{1}{32.174} * \frac{1}{12^2}\ lbf/in^2$

$p = 13.59\ lbft/in^2$

$P_{atm} = 14.66\ lbf/in^2$

so absolute pressure = $P_{atm} - p$

= 14.66 - 13.59 = 1.07 lbft/in^2

4 0

3 years ago

Examples of angular motion

ohaa [14]

Answer:

A figure skater doing a double axle

The swing of a baseball bat

The leverage on a hockey stick

hope it helps

3 0

3 years ago

Read 2 more answers

What happens when an electron moves from an excited state to the ground state?

Darina [25.2K]

When an electron moves from an excited state to the ground state, "Energy releases"

Hope this helps!

6 0

3 years ago

Acid mine drainage is:

Dahasolnce [82]

Answer:

Acid mine drainage is dissolved toxic materials wash from mines into nearby lakes and streams.

Explanation:

Acid mine drainage is the flow of acidic water with pH typically between 2 and 4, and high concentrations of other dissolved toxic materials from mines into nearby lakes and streams. It mainly occurs during metal sulfide mining, when the metal sulfide ore such as pyrite (FeS2) is exposed to water and oxygen from air to produce soluble iron and sulfuric acid.

Microorganisms, especially acidophile bacteria like Acidithiobacillus ferrooxidans grow by pyrite oxidation, i.e., oxidizing the Fe²⁺ in pyrite to Fe³⁺, which again react with pyrite and water to produce sulfuric acid. Then the acidic water flows into nearby water sources and reduces the pH value of water in those sources. As a result, heavy metals such as copper, lead, mercury, etc in other mineral ores also get dissolved into the water. The action of acidophile bacteria also increases the rate and degree of acid-mine drainage process.

The acid mine drainage causes water pollution and adversely affect the aquatic plants and animals. It also results in the contamination of drinking water, corrosion of infrastructures such as bridges, etc.

8 0

4 years ago