## anonymous one year ago If you gave the system an initial velocity different from zero, how would this affect the accekeratyion?

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1. anonymous

wiil you help me

2. anonymous

I mean acceleration

3. anonymous

no here is the qurstion If you have a heat engine with a hot reservoir of 515°C and a cold reservoir of 190°C, what is the thermal efficiency of the system?

4. anonymous

hello

5. Photon336

@marieeeee did they give you any more information for this question? $a = \frac{ V _{2}-V _{1} }{ t _{2}-t_{1} }$

6. anonymous

$v=u+at$ where v is your final velocity, u is initial velocity, t is time and a is acceleration Other equations relating a and u are $s=ut+\frac{1}{2}at^2$ $v^2-u^2=2as$ s is displacement

7. anonymous

You can clearly compare how acceleration changes when u is 0 or u has some value using any equation