A large reservoir at 20oC and 800 kPa is used to fill a small insulated tank through a converging-diverging nozzle with 1-cm2 throat area and 1.66-cm2 exit area. The small tank has a volume of 0.9 m3 and is initially at 20oC and 100 kPa. Estimate the elapsed time when (a) shock waves begin to appear inside the nozzle and (b) the mass flow begins to drop below its maximum value.

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

that the claims meet official rules.

don't misinterpret the claims

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.

friction

explanation:

they us to move forward and backwards