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3 years ago

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics?.

SAT

1 answer:

liraira [26]3 years ago

5 0

Answer:

The first law describes how thermal energy is conserved but not the direction it moves.

Thermodynamics is demonstrated as the branch of physics that deals with the associations or relationships between heat and other energy forms like mechanical, chemical, and electrical).

As per the question, the first law discusses that heat is a kind or form of energy and thus, processes associated with thermodynamics are subject to energy conservation principle. Therefore, heat energy can neither be destroyed nor created but rather transferred to one place to another and converted to and from other energy forms.

Thus, the first law of thermodynamics is distinct from the second law as 'the former describes how thermal energy can be conserved to and from other forms of energy and not the direction in which it moves' while the second law focuses on entropy.

Explanation:

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Rashid [163]

Answer:

trivia considerations, or pieces of information of little importance or value.

let me help u in ur questions

3 0

3 years ago

Read 2 more answers

Given three consecutive integers, if the sum of the first and third integers is increased by 8, the result is 5 less than triple

Dvinal [7]

We are looking for the value of the second integer, so let's mark it as X.

Then three consecutive integers are : (x-1) , x , (x+1)

The sum of the first and the third integers (X-1) + (X+1)

Five less than three times the second integer 3X - 5

Now we can write an equation and solve it for X

(X-1)+(X+1)= 3X - 5 simplifying left part

2X = 3X -5 subtract 2X from both sides

0 = X-5

X=5

SO THREE CONSECUTIVE INTEGERS ARE 4, 5, 6

6 0

3 years ago

Read 2 more answers

What is the molarity of a solution that contains 5.80 grams of nickel (ii) nitrate in 500. ml?

Rus_ich [418]

Answer:- 0.0634 M

Explanation:

molarity is defined as the number of moles of solute in 1 L of solution

molar mass of Ni(NO₃)₂ - 182.7 g/mol

number of moles of Ni(NO₃)₂ - 5.80 g/ 182.7 g/mol = 0.0317 mol

number of moles in 500 mL - 0.0317 mol

therefore number of moles in 1000 mL - 0.0317 mol / 500 mL x 1000 mL/L

molarity of the solution is - 0.0634 M

7 0

2 years ago

If a person takes 30 ml of vinegar a day and the molarity of the vinegar is 0. 84 m then how many grams of acetic acid (hc2h3o2

babunello [35]

The mass of the acetic acid is 1.512 g.

<h3 /><h3>What is Molarity?</h3>

molarity is the concentration of a substance in mol per dm³

From the question,

The number of moles contained in the 30 mL vinegar is

n = (0.84×30)/1000
n = 0.0252 mol.

the molar mass of vinegar is calculated below.

m.m of (HC₂H₃O₂) = [1+(12×2)+(1×3)+(16×2)]
m.m = (1+24+3+32]
m.m = 60 g/mol.

To calculate the mass of acetic acid, we use the formula below.

R.m = n×m.m............. Equation 1

Where

R.m = mass of acetic acid.

Substitute these values into equation 1

R.m = (0.0252×60)
R.m = 1.512 g.

Hence, The mass of the acetic acid is 1.512 g.

Learn more about molarity here: brainly.com/question/20383725

8 0

3 years ago

A grocery store has two recycling machines

Thepotemich [5.8K]

Answer is 112%

kinda skeptical about my answer but i am going to give it my best shot, sorry if i get it wrong.

In percent-type questions I always go by this formula:

not a % %

original number : 100%

new number : new %

original number × new % = new number × 100%

here, the original numbers are 240 and 180 and the new % is +30% and -10% now let plastic be P and metal be M and let's elaborate this a bit further

plastic:

the first recycling machine took in 240 plastic bottles while the second took in 30% <u>more</u> plastic bottles, what we have to do here is to find out how much bottles the second machine took in as a form of integer, which is the new number; let that new number be X, let's plug this in the formula

$240:100+30\\X:130 \\$

notice: 130 is the new %

$240*130 = 100X\\31200 = 100X\\312=X$

the second machine took in 312 plastic bottles, let's save this answer for later

metal:

the first recycling machine took in 180 metal cans while the second took in 10% <u>less</u> plastic bottles, we do the same thing and find the new number, this time let it be Y:

$180:100-10\\Y=90$

90 is the new % here; also, notice how sometimes you either add or subtract percents, depending on what the problem demands.

$180*90=100Y\\16200=100Y\\162=Y$

Now we can conclude that the first recycling machine took in 240 plastic bottles and 180 metal cans and the second took in 312 plastic bottles and 162 metal cans.

here comes the hardest bit to apprehend and the final part of this problem, "the second machine recycled what percent (%) more items than the first?"

in other words, how much percent did the second machine recycle more.

to find that percent, first we need to add the plastic and metal "items" of both machines individually and turn them into percents: let the first machine be A and second machine be B:

A: 240+180=420

B: 312+162=474

again, using the same formula to find the new percent, let that percent be Z; plugging both A and B respectively:

$420:100\\474:Z$

$420Z=474*100\\420Z=47400\\Z= 112.857$ ≈ 112% more items than the first

now if you check the rounded up 112 and plug it back in to make sure of your answer: $420Z=47400$ you end up getting 47040, since it's rounded up, but when you plug the full 112.857 you get 47399.94, closest to 47400. Tip: when you plug in any value for check up, don't use the rounded up one.

At last, those steps are actually fast, especially with that formula it's so important. the explanation seems intimidating so read it slowly and take your time. if you have any other questions, feel free to ask. also, let me know if you know a faster method to solve this question. <3

4 0

3 years ago