Nad otwartą z jednej strony rurą o zmiennej długości umieszczono kamerton wydający dźwięk o częstotliwości 3000 Hz. Przy powiększeniu długości zauważono dwa kolejne wzmocnienia dźwięku (rezonans akustyczny). Oblicz odległość między nimi.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.