Originally Posted by
Tino1210 Hello, Im looking for some guidance in rearranging formula. Need to ask if what I'm doing is right?
1) 4 (^x+1) = 6 ^0.5x , find x
ln4 (^x+1) = ln6(^0.5x)
x+1(ln4) = 0.5xln6
1.38x +1.38 = 0.895x
1.38 = (0.895/1.38) x ....
1.38 = 0.65x
x= 0.65/1.38
???
2) I = Imax (1-e ^-Rt/L) , R=30, L=0.01 - find t in seconds for current to reach 95%
= I/Imax = 1- e^ -Rt/1
=I/Imax+1 = -e^ -Rt/1
-ln (I/Imax+1) = -Rt/1 lne
-Rt/1= -ln(I/Imax+1)
-Rt= -ln(I/Imax +1) (l)
t= -ln (1/0.95 +1) (0.01)/-30
???
3) PV^Y = K , make Y the subject
V^Y = K/P
lnV^Y = ln K/P
YlnV = ln K/P
Y = ln(K/P) / lnV just you forget blue ln
4) V= Vmax exp -R/1 t , make t the subject
V/Vmax = e -R/1 t
ln V/Vmax = ln(e- R/1 t)
ln V/Vmax = -R/1 t lne
ln (V/Vmax) = -R/1 t
t = ln (V/Vmax) L/ -R