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3 years ago

Which phrase is the best definition for the word common in environmental science?

2 answers:

7 0

I believe that the best definition of the word common in environmental science is a typical resource. A typical resource is a resource that is not hard to find and is very common. The answer to the question will hence be A.
The answer could not be the other three choices because a shared resource is a resource that is used by more than one organism in the environment. A worthless resource is one that has no use in the environment while a rare resource is one that is hard to find.

Margaret [11]3 years ago

6 0

Answer:

B is correcta-moundo

Explanation:

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Complete the balanced equation for the reaction that occurs when formic acid (hcooh) dissolves in water. please include the stat

nignag [31]

Your balanced equation for this reaction is:

HCOOH (aq) + H2O (aq) → HCOO- (aq) + H3O+ (aq)

So from the reaction, we can see when formic acid dissolved in water so H3O+ ions will be formed.
and we can see that it is a balanced equation as:
we have H atoms = 4 on both sides of the reaction
and C atoms = 1 atom on both sides of the reaction
and O atoms = 3 atoms on both sides of the reaction
So it is our final balanced equation of the reaction.

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3 years ago

How does a nuclear reactor produce electricity

kaheart [24]

Answer:

Explanation:

Nuclear reactors are the heart of a nuclear power plant. They contain and control nuclear chain reactions that produce heat through a physical process called fission. That heat is used to make steam that spins a turbine to create electricity. Nuclear power plants use heat produced during nuclear fission to heat water. The heat produced during nuclear fission in the reactor core is used to boil water into steam, which turns the blades of a steam turbine. As the turbine blades turn, they drive generators that make electricity

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3 years ago

Upon landing, the 90.7 kg carbon fiber brakes of an airliner heat up 312∘C, producing heat. As the brakes start to cool back to

Crank

Given,

Mass of carbon fiber brakes = 90.7 kg = 90.7 x 1000 = 90700 g

Mass of the rubber tires = 123 kg = 123 x 1000 = 123000

Specific heat of carbon fiber = 1.400Jg∘C

As all the heat is transferred from the carbon fiber brakes to the rubber tires, the heat lost by the carbon fiber brakes is equal to the heat gained by the rubber tires.

So the temperature change of carbon fiber brakes, delta T = 172∘C

And the temperature change of rubber tires, delta T = 172∘C

The formula used for heat is,

Q = m s delta T

where Q is heat, m is mass, s is specific heat, and delta T is the temperature change

We know,

Heat lost by the carbon fiber brakes = Heat gained by the rubber tires

90700 g x 1.400Jg∘C x 172∘C = 123000 g x s x 172∘C

or, 90700 g x 1.400Jg∘C = 123000 g x s

or, s = (90700 g x 1.400Jg∘C) / 123000 g

or, s = 1.03236

Therefore, the specific heat of rubber tires is 1.03236 Jg∘C

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3 years ago

Read 2 more answers

What is true of a basic solution at room temperature? it has a ph value below 7. it has a greater concentration of hydroxide com

slega [8]

The true statement about basic solution at room temperature is that it has a greater concentration of hydroxide compared to hydronium ions.
Basic solutions have always pH greater than 7.
Basic solutions have bitter and caustic taste.
Basic solutions are not used as conductors in car batteries, acidic electrolytes are used in car batteries.

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3 years ago

The bond enthalpy in no is 632 kj/mol and that of each no bond in no2 is 469 kj/mol. explain the difference in bond enthalpies b

Solnce55 [7]

Bond enthalpy or bond energy is the amount of energy that is needed in order to break or take out one mole of the substance. The bond energy is varied between the compounds NO and NO₂ because of the different configuration of the atoms in order to form the compound.

That being said, it is also noted that the bonds will have different lengths and the molecules will have different shape and are also composed of different numbers of atoms.

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3 years ago