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Dahasolnce [82]
4 years ago
10

Energy cannot be created or destroyed. It can only be transferred from one form to another. Energy that is "wasted," does not di

sappear. Instead, it is transferred to its surroundings and spreads out so much that it becomes difficult to do anything useful with it. Incandescent light bulbs are very inefficient in energy transfer. Energy-saving lightbulbs, such as fluorescent bulbs transfer a greater proportion of electrical energy as light energy. In fluorescent bulbs what kind of energy is "wasted" in the energy transfer from electricity to light?
A) heat energy
B) kinetic energy
C) chemical energy
D) electrical energy
Chemistry
2 answers:
Inessa [10]4 years ago
7 0

Answer:

A: heat energy

Explanation:

because as we light up the bulb it gives us light energy

but when we touch it we feel that it is hot (heat energy)

the heat energy given of is not for our use and goes to waste

hoa [83]4 years ago
4 0

Answer: Option (A) is the correct answer.

Explanation:

Heat energy is defined as the energy produced due to the movement of particles, atoms or molecules in an object.

Kinetic energy is defined as the energy acquired by the molecules of an object because of their movement due to increase in temperature. More is the increase in temperature more will be the movement of molecules.

Chemical energy is defined as the energy which is stored within the bonds of a chemical compound.

Electrical energy is defined as the energy which arises due to the flow of electrons or ions in a substance.

In fluorescent bulbs, heat energy is wasted in the energy transfer from electricity to light.

Thus, we can conclude that heat energy is wasted in the energy transfer from electricity to light.

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Why melting point of Fe in blast furnace is lower than ellingham?
Kaylis [27]

Answer:

Because they are different oxides.

Explanation:

In both processes they are involve Iron Oxides, but in the case of Ellingham diagrams, it is consider the Iron in combination with oxygen to form FeO, so the melting point is around 1600  ºC. In the case of blast furnace, the Fe that is present in the ores, are primary the hematite (Fe2O3) and the magnetite (Fe3O4).

6 0
3 years ago
A 10 gram sample of H20 is sealed in a 1350 ml flask at 27°C. Given the fact that water has a vapor pressure of 26.7 mmHg at thi
Aleksandr-060686 [28]

Answer:

9.9652g of water

Explanation:

The establishment of the liquid-vapor equilibrium occurs when the vapour of water is equal to vapour pressurem 26.7 mmHg. Using gas law it is possible to know how many moles exert that pressure, thus:

n = PV / RT

Where P is pressure 26,7 mmHg (0.0351atm), V is volume (1.350L), R is gas constant (0.082 atmL/molK) and T is temperature (27°C + 273,15 = 300.15K)

Replacing:

n = 0.0351atm×1.350L / 0.082atmL/molK×300.15K

n = 1.93x10⁻³ moles of water are in gaseous phase. In grams:

1.93x10⁻³ moles × (18.01g / 1mol) = <u><em>0.0348g of water</em></u>

<u><em /></u>

As the initial mass of water was 10g, the mass of water that remains in liquid phase is:

10g - 0.0348g = <em>9.9652g of water</em>

<em />

I hope it helps!

4 0
3 years ago
How reactive is an atom of Sodium(Na) and why?
s344n2d4d5 [400]
3rd one:
it is very reactive because it does not have a full Valence shell.

this is because it's in group 1 so it has one electron in its outer shell, and it wants to have a full outer shell ( which it can gain by losing the electron in a reaction).

Hope this helps :)
5 0
3 years ago
Is the prime meridian a longitudinal or latitudinal line?
Nesterboy [21]

Answer:

longitudinal

Explanation:

A prime meridian is the meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid into two hemispheres.

4 0
3 years ago
How much water should be added to 4.3 moles of LiBr to prepare a 2.05 m solution?
arsen [322]

Answer:

2.1 kg of water

Explanation:

Step 1: Given data

  • Moles of lithium bromide (solute): 4.3 moles
  • Molality of the solution (m): 2.05 m (2.05 mol/kg)
  • Mass of water (solvent): ?

Step 2: Calculate the mass of water required

Molality is equal to the moles of solute divided by the kilograms of solvent.

m = moles of solute/kilograms of solvent

kilograms of solvent = moles of solute/m

kilograms of solvent = 4.3 mol /(2.05 mol/kg) = 2.1 kg

8 0
2 years ago
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