Recent content by cyy91

thx fr da help collinsmark...truly helps...:approve:

Homework Statement a generator of e.m.f 20V and internal resistance of 0.5 ohm is used to charge a car battery of emf 12V and internal resistance 0.10 ohm.They are connected in series together with a resistance R whose value is adjusted to give a charging current of 2.0A. I was asked to...

m1u1 + m2u2 = m1v1 + m2v2 its wad I've been taught in my school... 2 identical bodies means both object is the same... assuming both objects have the same mass... in a perfect elastic collision, both objects exchange velocity... so the 1 that has 4ms-1 now has -6ms-1 while the 2nd 1 will...

thx a lot metallic... nw i understand... cuz my teacher nw oni say dat dis question has haven been taught... it requires long division which u jz xplained...thx

the answers indicate z = 1 z = -\frac{1}{2} +/- \frac{square root 3}{2} i i understand dat when a triangle is equilateral, all its angle must be 60 degrees. with that in mind i can use cos 60 to find x and sin 60 for y... d oni thg i dun understand nw is da positive n negative signs... my...

Homework Statement (z^3)-1 = 0. Solve the equation and show that the roots are represented in an Argand Diagram by the vertices of an equilateral triangle.Homework Equations The Attempt at a Solution i can only found 1 as the answer.By transferring the -1 to the other side to become 1 and cube...

thx a lot...understood...

Homework Statement Car A travel at uniform velocity at 20 metre per second from t=0s. Car B starts with 5 metre per second during t=0s and accelerates uniformly to 30 metre per second in t=30s.It travels at constant velocity of 30 metre per second from there onwards Homework Equations The...