Ron wants to install an energy efficient and long lasting device for lighting in his new home. Which device should he use?

Answers

Answer 1

Answer:

Answer:

Light Emitting Diode (LED) lighting device.

Explanation:

Light Emitting Diode (LED) is an electrical component that produces light when a current flows through its terminals. It has a long life span and conserves energy coupled with brilliant lightning effects. Also, it is light in weight and generate no heat compared to other lighting devices. It is majorly recomended because of its diverse properties and efficient functions.

This componet can be incorporated to produce an energy efficient and long lasting lighting device. So, Ron should use a Light Emitting Diode (LED) lighting device.

Answer 2

Answer: he should use the long lasting one

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What does the molecular formula of a compound describe?

Answers

Answer: Molecular Formulas. Molecular formulas are a compact chemical notation that describe the type and number of atoms in a single molecule of a compound. Identify the molecular formula of a compound given either its name or structural formula.

Explanation:

fluorine is a toxic, reactive gas. which representation (structural formula, electron dot structure, or three-dimensional model) would you use to explain why fluorine is so reactive, why?

Answers

I think the correct answer is to use its electron dot structure. Fluorine is the most electronegative element among the halogens. It has 5 electrons in its 2p shell wherein it should have 6 electrons.

The enthalpy of a system is the same as its:A. specific heat.
B. heat of reaction.
C. heat of combustion.
D. heat content.

Answers

The answer for above statement:

D. heat content.

Explanation:

Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.

Heat content - (thermodynamics) a physical science amount adequate the interior energy of a system and the merchandise of its volume and pressure.

Ans D) heat content

Enthalpy (H) is a thermodynamic state function which according to the first law of thermodynamics is a sum of internal energy (E) and the pressure- volume (PV) work.

i.e. H = E + PV

Thus, enthalpy is the total heat content of a system which includes contributions from both kinetic and potential energy.

Beth’s hygrometer is reading a temperature of 30°C and a relative humidity of 65%. The humidity in the air is how many grams/cubic meter.

Answers

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, humidity in grams/cubic meter is 19.5.

What is matter?

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter.

humidity =30 × 65% =19.5 grams/cubic meter

Therefore, humidity in grams/cubic meter is 19.5.

To learn more about matter, here:

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Answer:19.5 grams/cubic meter

Explanation:30 times 65% search it it equals 19.5

When dissolved in water, an Arrhenius base yields(1) hydrogen ions (2) hydronium ions(3) hydroxide ions (4) oxide ions

Answers

Arrhenius bases yield hydroxide ions when in solution. Arrhenius acids on the other hand yield hydrogen ions (which is sometimes called hydronium since the H⁺ turns to H₃O⁺ in water).

I hope this helps. Let me know if anything is unclear.

Any temperature on the Kelvin scale can be changed to Celsius degrees bya. subtracting 100 from it.
b. adding 212 to it.
c. subtracting 273 from it.
d. subtracting 32 from it.

Answers

c. subtracting 273 from it.

C. Subtract 273 from it

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