Recent content by thinkcentre12

My question is what is the difference between ΔE and ΔU. Because I see both equations 2 and 3 interchangeably . But then I see equation 1. So there has to be a difference between them since they are using both symbols in one equation. I thought U was internal energy while E was total energy...

That is a good point. Thank you

ok thank you. Since i did not see an arrow i was not sure which direction to pick. How did you tell?

Homework Statement Homework Equations The answer in the back on the book shows 4.06i -7.61j + 5.07k. I do not understand why my signs are backwards.The Attempt at a Solution I ended with -4.06i +7.61j - 5.07k

Any thoughts?

If I was running at a constant speed would any of those 14 equations change? (The equations previous listed). I ran three more trips in traffic and that seemed to really help my percent error.

Atleast i got an answer hah. Thanks you. i guess i should re think my project. Makes sense

Its ok. Oh ok that's great atleast i got that part right. I see what you are saying

Yes that is correct. 'A' would be the total amount of fuel used by the car and 'C' would be the amount of fuel used by the car for actual work. But if you figure your car's motor is 10% efficient then you can divide the fuel used by the car by .1 to get the total amount of fuel put into the...

That is true that sounds very good. My gallons calculated compared to the gas i put into the car at the pump. i wanted the percent error between them to be smaller but i ended up with like 55% error instead.

Is this is. It is for a PHYS class. Yeah that is true maybe you are right. Thats the way i was leaning towards since i cannot get the correct data. Just explain in my project why i think my percent error was so high and things i can do to lowwer the percent error. I just figured my answers...

So it is work by the engine calcuated? The highway i used was complete flat and drove at 70 mph for about 32 of the 33 miles. That is true i see what your saying the GPS does not have the ability to show some of these features. The reason for this approach was for school. We were assigned to...

That is correct. If my efficiency was less than 10, then my numbers would line up a lot better. But i highly doubt that would be the case since most engienes are higher than 10%. I tried googling about the engiene to see if i could find a percent but no luck.

My start and end poinst are of the same place. I guess i am i was not really sure how to factor all of those into my calculations. Those 14 bullet points are the equations i used in my data to get the final number. I just calcuated power with the integral like i said above