một ô tô chuyển động thẳng nhanh dần đều qua hai điểm A, B cách nhau 20m trong 2s vận tốc o tô tại B là 54km/h . tìm gia tốc và vận tốc ô tô tại A

Act has a 1200: 5 or 240: 1 turns ratio. it is short circuited. what is the maximum current at 1200a primary if we put a 100ohm resistor across the secondary end of the ct. use it as current source circuit.

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Which type of basaltic lava flow has a fairly smooth