Recent content by abruski

Homework Statement \lim_{x \rightarrow \frac{\pi}{4}} \frac{\sqrt[3]{tgx} - 1}{2sin^2x-1}Homework Equations The Attempt at a Solution I don't even know where to begin

Homework Statement \left( \frac{2 \sqrt{3}+2i}{1-i} \right)^{50} Homework Equations z = a+ib z = r(cos \phi + isin \phi) r = \sqrt{a^2+b^2} cos \phi = \frac{a}{r} sin \phi = \frac{b}{r} \frac{z_1}{z_2} = \frac{r_1}{r_2}\left( cos(\phi_1-\phi_2) + isin(\phi_1 -...

What about the acceleration?

how come distance is not 100m?

a = \frac{v}{t} = \frac{20}{5} = 4 \frac{m}{s^{2}} s = vt = 100 m F = ma = 1000*4 = 4000 N A = Fs = 4000*100 = 400000 J P = Fv = 4000*20 = 80 000 W P = \frac{A}{t} = \frac{400000}{5} = 80 000 W seems pretty straightforward to me

Homework Statement A car with mass m = 1 metric ton (1000 kg) in time t = 5 seconds reaches speed v = 20 m/s What is the power of the car? P = ? kW (kilo Watts) Homework Equations F - force, a - acceleration, A - work, s - distance P = \frac{A}{t} P = Fv F = ma a = \frac{v}{t} A = Fs s...

I saw the wrongness of my ways now. Thank you

The parallel resistor formula I took from the same lesson of the same book. Very weird. Anyway, thanks guys :)

Homework Statement I have 4 resistors R1=R2=R3=R4=40\Omega I need to find the Equivalent Resistance when they are connected in series and when they are connected in parallel. The problem is my answer for the parallel differs from the answer given in the book. Homework Equations Series...