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# OM

• ### Is an e book the same as a PDF?

My question basically is, what's the difference between a PDF and e book?

5 AnswersBooks & Authors6 years ago

In the steady operation of an adiabatic centrifugal compressor, saturated vapor R-134a at 40 F with a mass flowrate of 0.13 lbm/s . The refrigerant exits the compressor at 200 psia. The compressor’s isentropic efficiency is 65%.

a)Determine the minimum power [hp]

b)For the actual compressor, determine the exergy destroyed [hp].

Im having a little problem on figuring out what the end state is. Is it a superheated vapor, saturated vapor or mixture of liquid and vapor.

It seems as it should be a superheated vapor but i cant conclude that, and what would my enthalpy be than?

Thank you.

• ### r^2+6=0 Complex Roots Help/Review Work?

y''+6y=0, given initial values: y(0)=1 and y'(0)=6

aux eq: r^2+6=0

r= -sqrt6,+sqrt6

general solution y(t)=e^(t)(C1Cos(t)+C2Sin(t))

when plugging in: 1=e^(0)(C1Cos(0)+C2Sin(0)

so....C1=1

y'(t)= -C1(sqrt(6))Sin(sqrt(6t))+C2(sqrt(6))Cos(sqrt(6t))

when plugging in 6= -C1+C2

so.... C2=7

y(t)=e^(t)(Cos(sqrt(6t))+7Sin(sqrt(6t)))

Apparently im getting this wrong, idk what im doing wrong.

Any help is appreciated!

• ### Power series 2, help?

so im given 5/(1-4x)^2, so i have to get it into EcnX^n

So i have 5*(1/(1-4x))=5E(4x)^n

5E(4x)^n=5E4^(n)X^(n)=5E4^(n)*nX^(n-1)

when taking the derivative of 5E4^(n)*nX^(n-1), we gert

5E4^(n+1)*(n+1)X^(n)

I have that, i believe its right, however how do i find Co,C1,C2,C3

i am lost at that part. ??

• ### Help with Power series 2?

so im given 5/(1-4x)^2, so i have to get it into EcnX^n

So i have 5*(1/(1-4x))=5E(4x)^n

5E(4x)^n=5E4^(n)X^(n)=5E4^(n)*nX^(n-1)

when taking the derivative of 5E4^(n)*nX^(n-1), we gert

5E4^(n+1)*(n+1)X^(n)

I have that, i believe its right, however how do i find Co,C1,C2,C3

i am lost at that part. ??

• ### Do you have children or other dependents that you support?

im applying for Financial Aid, and i don't know how to answer this question. I'd said no, because im only 17 years old and i don't financially support anyone and don't have children. I just want to make sure am i right or wrong, and can you explain why.

-Thanks

• ### how fast can i see results?

im already a little big right now, but i want to bet bigger. im about 195 lbs, i work out hard and i use whey protein and i try to eat right. before i would just lift weights every other day and i would work out my upper body on one bad , and legs on another.

so i just started a workout plan where i would do 2 different set of muscles each day for 5 days.

so i wanted to know, is the plan that i just mentioned above better than just plain working out and doing every muscle every time i work out?

also will i see results and how fast will i see results?

1 AnswerDiet & Fitness10 years ago
• ### whey or creatine or jack3d?

i want to buy a protein supplement, which one should i buy?

which supplement is the best and why?

4 AnswersDiet & Fitness10 years ago
• ### how fast can i add muscle mass?

i been working out about a year and im around 195 pounds, mostly muscle, just a bit fat!

however, i never worked out my legs before, and now im starting to, and working out your legs increases testosterone, which means i would add more muscle, fast!

and whether your wondering if work out, yes i do 3-4 times a week and i try to eat properly.

my question is will i add a great amount of muscle since i started working out my legs?

2 AnswersDiet & Fitness10 years ago
• ### few questions about whey protein?

i been working out for a year now and decided to start using whey.

so i just wanted to know, how long will it be until i see results?

If needed- im not trying to lose weight, im trying to gain muscle mass and right now i weigh 191 most of it muscle!

1 AnswerDiet & Fitness10 years ago
• ### I want to get bigger and i have a few questions.?

I been working out for a while and I was wondering, how much calories approx. should I take in a day.

Any specific kinds of food I should eat and when should i eat them(ex: after working out or before)

What should i eat before and after working out?

Also should i take any kind of protein shakes/supplements(No steroids).

If needed i'm 16 years old around 180lbs, i stay around 2 to 2:30 hours at the gym for 5 days a week

If you have any websites that can be useful site them

Thanks

• ### I want to get bigger and i have a few questions.?

I been working out for a while and I was wondering, how much calories approx. should I take in a day.

Any specific kinds of food I should eat and when should i eat them(ex: after working out or before)

What should i eat before and after working out?

Also should i take any kind of protein shakes/supplements(No steroids).

If needed i'm 16 years old around 180lbs, i stay around 2 to 2:30 hours at the gym for 5 days a week

If you have any websites that can be useful site them

Thanks

• ### How to get bigger/Stronger?

I been working out for a while and I was wondering, how much calories approx. should I take in a day. Any specific kinds of food I should eat and when should i eat them(ex: after working out or before)

What should i eat before and after working out?

Also should i take any kind of protein shakes/supplements(No steroids).

If needed i'm 16 years old, i stay around 2 to 2:30 hours at the gym for 5 days a week

If you have any websites that can be useful site them

Thanks

• ### How to set up a math problem in words.?

Gary's salary is \$25000 and he expects to receive a 4 percent raise each year. How much money will he make 10 years from now?

• ### How many calories should i eat a day?

so i go to the gym 4-5 times a week for 2-3 hours and i was wondering how much calories should i eat a day.

Plus when i go to the gym i work on getting stronger and lifting weights not cardio.

Plus im 16 years old (if needed).

Plus if you know any websites can you site them. Thanks

• ### Does Bowflex really work?

i thought of buying a bowflex however i first want to know if it works.

So if anyone has one can you tell me if it works.

Thanks

• ### Is it right for me to have lost 30 pounds since the beginning of the summer?

So everytime I run i lose about 3-4 lbs so i was wondering is it right for me to lose that much.

Also i lost 31 pounds since the beginning of the summers.

Im 15 i weight around 159 and at the beginning of the summer i weight 190 and i was wondering if its right for me to have lost that many pounds?