wanted90

Hi please Can help me to convert then unit of pressure 1 ) Mn/m^2 to pa 2 ) Gn/m^2 to pa 3 ) bar to pa 4 ) atm to pa

thanks I got it .

Hi why in this question we did not convert the unit of temperature to kelvin ? Aluminum has A specific heat of 0.902 J/gm C . How much heat is lost when a piece of aluminum with a mass of 23.984 gm cools from a temperature of 415.0 C to a temperature of 22.0 ? the answer is : Q = m Cp X delta T =23.984 X 0.902 X 22 - 415 = -8500 J

thanks so much

Hi what is the difference between calorie and specific heat ?

Hi all .. Here I have two questions .. could please help how I can solve that give me idea , and can please clear out the meaning of question ? question number 1 question number 2

Why here work is become negitive not plus Pleas clear out that

Hi Here is a question with answer , in fact I don't understand the answer fully .. please can explain to me the answer .. pleas anyone clear out the answer and here in answer I saw that work is negative is that because work done by the system ? The question : - solution : -

thanks but I face problem before this semester teacher said work done by system is always positive and now in this semester he said that work done by the system is negative that why I was confusing !! thanks so much thanks so much

Hi How are you I have a question how we can know the work if - or + also heat energy please could see this question why in answer take work as - and heat as +