how can the development of energy storage systems help solve the environmental problems caused by acid precipitation

1 answer:

7 0

The burning of fossil fuels to supply the electricity we use is a source of sulfur dioxide and nitrogen oxides. Another source is the burning of fuels to power cars, ...

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Does sound travel faster in a warm room or a cold room?

yawa3891 [41]

Answer:

Sound is vibrations that travel through a medium, and which are then converted into electrical signals by our brain so that we interpret them as a noise that we hear. These vibrations consist of particles colliding with each other (this is why sound cannot travel through space; there are no particles). At warmer temperatures, the particles that make up air will move faster, so these collisions will happen more frequently. Therefore the vibrations occur more quickly, so sound travels faster and reaches our ears in a shorter amount of time.

The speed of sound can travel faster in hot air than it can in cold air. This is because the molecules of air can move even faster and the vibrations of the sound wave can transmit faster. Sound is a type of mechanical wave, meaning that it requires a medium to transmit energy. Mediums are any substance that has mass and takes up space, from the air in the room to the metal atoms in an iron fence.

Explanation:

hope that helps :)

3 0

3 years ago

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Which of the following statements are true about the international system of measurement?

Gnom [1K]

The full question is:
<span>Which of the following statements are true about measurements and units?
A. The SI Unit is used by scientists all over the world.
B. The unit of mass in the SI system is the kilogram.
C. Measurements do not need to include units.
D. The English system of measurements is based off of the powers of ten.</span>
The correct answer is A. The SI Unit is used by scientists all over the world. <span>The <span>International System of Units is the metric system which consists of units of measurement. There are 7 main units: ampere, Kelvin, second, meter, kilogram, candela, mole and 22 derived units.</span></span>

6 0

4 years ago

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Which compound will conduct electricity when it is dissolved in water?

Marta_Voda [28]

<h3>Answer:</h3>

CuSO₄

<h3>Explanation:</h3>

The compounds that conduct electricity when dissolved in water are known as electrolytes.
Electrolytes may be defined as compounds that conduct electricity either in aqueous or molten form, due to the presence of mobile ions.
Electrolytes are therefore decomposed by passing an electric current through them.
Examples of electrolytes include CuSO₄, NaOH, NaCl, etc.
Non-electrolytes, on the other hand, do not conduct electricity and cannot be decomposed through electrolysis.

4 0

3 years ago

Why would a scientist measure the amount of carbon-14 a fossil contains

stiv31 [10]

A scientist would measure the amount of carbon-14 (¹⁴C) in a fossil to determine its age.

The ¹⁴C:¹²C ratio is constant in living organisms. When they die, the radioactive ¹⁴C decays, so the ratio changes. The half-life for the for the decay is 5730 a, so scientists can work backwards and calculate how long ago the plant died. The method is good for determining the age of fossils up to 50 000 a old.

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3 years ago

A blood sample with a known glucose concentration of 102.0 mg/dL is used to test a new at home glucose monitor. The device is us

katrin [286]

Explanation:

Actual value = 102.0 mg/dL

Calculation of absolute error and relative error for the measured value, 98.4 mg/dL

Absolute error = |Actual value - measured value|

= | 102.0 - 98.4 | = 3.6

Relative error = $\frac{Absolute\ error}{Actual\ value}$