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cine poate defini 1 CP ??

chuckyro
post 22 Dec 2004, 13:21
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sau unde gasesc info util !
sunt curios ... deci nu arde :wink:


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McVic
post 22 Dec 2004, 13:38
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hp (English horse power) = 745.7 W = 0.746 kW = 550 ft.lb/s = 2545 Btu/h = 33,000 ft.lb/m = 1.0139 metric horse power


Horsepower is the imperial (British) unit of power. A horsepower is the ability to do work at the rate of

33,000 ft.lb per min or
550 ft.lb per second

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Horsepower is the imperial (British) unit of power, now replaced by the watt - the new SI unit. One horsepower is the work done at the rate of 550 foot-pounds per second and it is equivalent to 745.7 watts. Horsepower was first used by James Watt, who employed it to compare the power of steam engines with that of horses.


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chuckyro
post 22 Dec 2004, 13:47
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In English please !!

ai baut tot ce era in frigiderul ala din poza si apoi mi-ai dat explicatia ? biggrin.gif :wink:

define lb , ft ... in kg , km ....

si eventual o explicatie mai pamanteana nu stiintifica

smile.gif
10x


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electriczbif
post 22 Dec 2004, 13:53
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Mai da' pretentios mai esti! :wink: De Google cu al sau "I'm feeling lucky" ai auzit? Ia de aici:
http://www.onlineconversion.com/power.htm
Ca sa nu mai zic ca pari usor invidios pe mcvic si frigiderul lui...


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McVic
post 22 Dec 2004, 13:56
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1 pound e 0.45 kg
1 feet e 0.30 m din 1 m


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McVic
post 22 Dec 2004, 13:57
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NU VA LUATI DE FRIGIDERU MEU :!:
Poate fac cinste laugh.gif


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McVic
post 22 Dec 2004, 13:58
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QUOTE
1 pound e 0.45 kg
1 feet e 0.30 din 1 m


....0.30 metri adica, .........edit.........ce vremuri


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McVic
post 22 Dec 2004, 14:00
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si daca e cineva curios cat este i hp dint-un atomwatt

1 horsepower [metric] = 7,354,987,499,999,999,976,488.354987499999999e+21 attowatt


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127.0.0.1
post 22 Dec 2004, 14:30
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bogdan20
post 22 Dec 2004, 21:49
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un cp reprezinta ridicarea unei greutati de un kilogram la inaltimea de un metru in interval de o secunda


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electriczbif
post 23 Dec 2004, 09:14
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QUOTE
un cp reprezinta ridicarea unei greutati de un kilogram la inaltimea de un metru in interval de o secunda
Pe ce planeta, respectiv ce acceleratie gravitationala ai luat in calcul? Din socoteala mea iese g=735,75 m/s2.


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danielh
post 23 Dec 2004, 09:43
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O explicatie destul de intuitiva se gaseste aici: http://auto.howstuffworks.com/horsepower.htm


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SorinV
post 24 Dec 2004, 21:36
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electrizbif ia mai deriveaza viteza aia de 1 m/s sa vezi ce acceleratie obtiii ! sau integreaza acceleratia ta sa vezi ce viteza obtii ! laugh.gif


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electriczbif
post 25 Dec 2004, 03:03
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QUOTE
electrizbif ia mai deriveaza viteza aia de 1 m/s sa vezi ce acceleratie obtiii ! sau integreaza acceleratia ta sa vezi ce viteza obtii !

Stai cuminte ca acceleratia gravitationala n-are nici o legatura cu viteza aia de 1m/s a masei de 1 kg...biggrin.gif Ca o paranteza: daca derivez viteza de 1m/s in timp obtin o acceleratie 0, daca aceasta viteza e constanta!
Rationamentul meu a fost urmatorul:
P= L/t = F*d/t = G*d/t = m*g*d/t
unde
m=1kg, g=accel gravitationala, d=1m, t=1s, P=1 cal putere (metric) care conform link-ului de mai sus este 75 kilogram-forta metru / secunda.
Deci daca bogdan20 sustine ca 1CP=1kgfm/s, si m=const=1kg, d=const=1m, t=const=1s, atunci pt. ca relatia sa fie corecta acceleratia gravitationala ar trebui sa fie de 75 ori mai mare, deci 75*9,81m/s2=735,75m/s2 (respectiv trebuie sa ai un alt kgfm/s decat cel de pe pamant, de 75 ori mai mare).
Inca o data, acceleratia in discutie este cea GRAVITATIONALA, si nu acceleratia masei de 1 kg, care se presupune ca se misca vertical in sus cu viteza CONSTANTA de 1m/s!


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electriczbif
post 25 Dec 2004, 03:12
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Si inca o chestie: asa sedentar cum sunt (PC-ul + megane-ul) cred ca as putea ridica vreo 20-30kg la inaltimea de un metru intr-o secunda, si asta cu pornire de pe loc! Sa am eu puterea de 20-30 cai?! WOW, sunt bun de tot! Patru-cinci ca mine aduc megane-ul de pe loc la 100km/ora in 10 secunde!


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SorinV
post 25 Dec 2004, 18:11
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se poate sa fie si ca tine dar mi se pare cel putin ciudat! daca faci integrala din m/s^2 si scotand constanta aia in fata nu obtii tocma viteza de 1m/s ! oricum nu ma apuc sa fac acelasi calcul ca si tine te cred pe cuvant ! ramane de vazut care e pana la urma iapa putere !


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bogdan20
post 25 Dec 2004, 19:42
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ma eu definitia asta o stiu de la un mecanic.iti dai seama ca nu am inventat-o eu.Am intrebat odata pe cineva si asta a fost raspunsul care mi-a fost dat.Alte calcule legate de fizica nu pot sa dau pentru ca nu ma pricep.


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bogdan20
post 25 Dec 2004, 19:44
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mentionez ca nu ma pricep la fizica, la altele precum mecanica mai stiu si eu cate ceva. mersi!


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electriczbif
post 25 Dec 2004, 20:46
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QUOTE
ma eu definitia asta o stiu de la un mecanic.iti dai seama ca nu am inventat-o eu.Am intrebat odata pe cineva si asta a fost raspunsul care mi-a fost dat.Alte calcule legate de fizica nu pot sa dau pentru ca nu ma pricep.
Un mecanic Renault, cumva? That explains it! wink.gif
Stai linistit ca nu-i stress, mai glumim din cand in cand ca altfel prea ne luam in serios. Omu' are suficiente link-uri ca sa-si faca o idee.
Oricum si calculele mele se bazeaza pe ceva fizica facuta in vremuri imemoriale...


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bogdan20
post 29 Dec 2004, 20:44
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nu era un mecanic era unul mai batran se pricepea omul la toate!


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megane4life
post 19 Nov 2005, 21:06
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Salut. Nu o sa incerc sa dau o definitie pt calul putere, oricum, citind thread-ul asta am mai cautat si eu pe net informatii pe aceasta tema. Si ce-am gasit pe Wikipedia nemtzeasca: nu se mai recomanda folosirea calului putere ca unitate de masura a puterii motorului, pt ca este o unitate invechita (si trebuie sa fiu de acord, doar vorbim de masini, nu de carutze), ci a Watt-ului (mai exact Kilowatt-ului). De-aia, daca va uitati la specificatiile tehnice din majoritatea brosurilor de prezentare sau de pe majoritatea site-urilor cu tema auto, valoarea puterii este data in principal in kW si doar in paranteza in CP. Din anul 2009 nu se mai permite (in Germania cel putin, probabil in toata UE) folosirea calului putere ca unitate de masura.


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dadu
post 19 Nov 2005, 22:08
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deci si in concluzie ca sa zic asa: 1 CP reprezinta forta necesara ridicarii unei greutati de 75kg la inaltimea de 1m intr-o secunda.
si da, se va scoate cp-ul in curand


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