Recent content by hbk69

Bump, any help for the problem i have in the above post. Have an Exam soon Thanks for any guidance

thanks a million bro! much clearer.

Thanks for the help! I found a question, it says: Calculate the pressure at the bottom of the mercurly column: density of mercury=13600Pa. Pressure(h)=Pressure(Outside)=atmospheric pressure. At standard atmospheric pressure the height of the mercury h=0.760m In this particular problem...

And this is the explantion for why we add the atompsheric pressure in problems where we have an object under the surface of a liquid? also how does the atmospheric pressure affect the liquid as a whole?

In the given problems i don't understand the reasoning behind the convection which is used and that would indicate i don't understand what is going on in the problem, with regards to question 1 my understanding is clear now given that you confirmed that the metal loses heat while the water gains...

Most of the problems i have done so far are ones where i had to add the atmospheric pressure but i did not, i have not done any problems where i was not required to add the atmospheric pressure i guess if i was given some problems where i did not have to add the atmospheric pressure my...

thanks for this post! as a guideline what are the general scenarios where you have to add the atmospheric pressure and cases where you do not? going by your post i'd have to add it in most of my physics problems. Above tubes and above the surface of an ocean i'd have to add it? but what about...

So you are saying it does not matter which one you put as the negative, there will always be one positive Q and one negative Q, but that could possibly cause some problems when you are rearranging the formula when you are trying to find a specific variable For example in question 2 Q=-Qw...

Question 1) Qw(heat energy of water) = -Qm(heat energy of metal) In this scenario why is the Qm negative? is it because the metal loses heat while the water gains heat energy? Qw=c(specific heat capacity of water)*mw(mass of water)*(T3-T2) Qm=cm(specific heat capacity of the...

Homework Statement There are certain problems involving pressure where you are required to add the atmospheric pressure to solve the problems, i have done some problems where i work everything out but get the answer wrong because i did not add the atmospheric pressure. How can i overcome this...

In the question 2 problem i understand that the heat Q of the gass flows from the gas to the water but don't understand how the Qw energy of the water becomes negative because it is gaining energy and in question 1 when the Qw of water gains energy from the metal it remains positive hence the...

Homework Statement Question 1) a mass m=200g or an unknown metal is heated to a temperature T1=200°C and then dropped into m=50g of water at a temperature T2=20°C in an insulated container. The water temperature rises within a few seconds to T3=39.7°C and then changes no further. Specific heat...

Thanks for the help, i understand the issues i had earlier.

Thanks for the help :), makes sense now in regards to my problems with question 1 and question 2. But in question 3: The atom has energy levels n=1(0eV),n=2(2eV) and n=3(5eV). A photon has energy E=3eV which corresponds to spectral line with λ=414nm. Where would this spectral line be...

How can i solve the issues in the OP with the three questions please any help appreciated. Thanks