Recent content by BMWPower06

My goal is to see the variation of how the alternator/engine will react when dealing with a 100% charged battery vs a 70% charged battery. My experiment for determining the variation in response from the alternator/engine is set up, I just need to figure out how to drop the charge of the...

ok so if it is universally accepted that 11.8V is a fully discharged battery and 12.6V is a fully charged battery then: 12.6V - 11.8V = 0.8V 0.8V*0.70 = 0.56V Charge 11.8V + 0.56V = 12.36V for a 70% charged battery Is this acceptable?

Thanks for the explanation, I think I understand it a little better now. As for testing it, I keep coming across these numbers as seen on wikipedia, where 75% charge of a 12V battery shows a no load voltage of 12.35V, however, I cannot determine how they are getting this value. Do you have...

by 70% I am referring to stored energy (I believe). Basically, I know that the alternator will charge the battery to 100%, I need the battery to be at 70% prior to starting the car and having the alternator charge it. Also, how do you know that there is no charge left if the battery is at...

I studied mechanical engineering in college, so electrical engineering isn't my strongest suit. Basically I have a 12V car battery that I need to discharge to 70%, how can I do this? I know that I can monitor the state of charge by determining the open circuit voltage after ~24 hours of...

Ahh okay, so basically at x=0 the pressure is 300kPa. So to plot the change in surface pressure I would do the following: 300 - [(1/2)*rho*(Uinfinity^2) - (rho*g*x)] Where Uinfinity is the free stream velocity. Is that correct? Since I am given that the pressure a tthe surface plate is...

any help?

anyone?

So do I solve for P/V= Also, I'm still confused as to what the constant in the equation above represents? Thanks

any ideas?

Do I just solve for P in the above equation and that will give me surface pressure? What constant value do I use?

are you referring to this equation?

any help?

Hi guys, so I have a problem where I am given the stagnation point pressure and the free stream velocity as well as the temperature of the isothermal plate and temperature of the free stream. I am asked to plot the surface pressure at the isothermal plate for a range of x=0 to x=1 given...

Surface Pressure Equation?? Homework Statement Given pressure and the free stream velocity as well as the temperature of the isothermal plate. Homework Equations This is where I'm lost? The Attempt at a Solution It asks me to plot the surface pressure at the isothermal plate for a...