- #1
sniffer
- 112
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i just want simple explanation of this.
velocity v is a function of r and t.
then my professor, in order to derive relationship of something, he wrote:
[tex]\frac{dv}{dt}=\frac{\partial v}{\partial r}+\frac{\partial v}{\partial t}[/tex]
then assuming small spatial variation,
[tex]\frac{dv}{dt} \approx \frac{\partial v}{\partial t}[/tex]
my question: is the first equation above OK?
is it standard calculus? i am weak in this. please help.
thanks.
velocity v is a function of r and t.
then my professor, in order to derive relationship of something, he wrote:
[tex]\frac{dv}{dt}=\frac{\partial v}{\partial r}+\frac{\partial v}{\partial t}[/tex]
then assuming small spatial variation,
[tex]\frac{dv}{dt} \approx \frac{\partial v}{\partial t}[/tex]
my question: is the first equation above OK?
is it standard calculus? i am weak in this. please help.
thanks.