Homework Statement
I don't understand how the website below got the equations for the output and input resistances
Homework Equations
http://www.statemaster.com/encyclopedia/Common-collector
My girlfriend recently took a physics exam, and she was confused about why she got one of the problems wrong. She asked me hoping I could clear it up. Heres my attempt
Homework Statement
Three Identical balls are thrown from the top of a building, all with the same initial speed. Ball A is...
Well, the first semi-accurate measurement of time came from pendulums. they had second pendumlums and what not. They also had mechanical clocks which showed seconds and minutes and hours like modern clocks. I doubt they were, but they could have beared a resemblance to modern day grandfather...
Well, I guess cause its something consistent that we can measure. They want something that is universally constant in nature.
Its the same with a meter, being defined by distance traveled by light in absolute vacuum in 1⁄299,792,458 of a second.
the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom
taken from wikipedia. but I remember learning it in physics.
Oh, and its the unit of time...
Before I ask my question, I understand its possible to balance an egg. I just went out to buy some eggs and did it. I seem to have a magic egg that literally takes me about 3 seconds to balance. (I did cheat a bit. I shook it up pretty nice to break the chalaza to lower the center of gravity.)...