Describe a physical system and a social system that have had a positive effect on your community or environment. Describe ways in which a physical system and a social system have had a negative effect on your local community or environment.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

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].

What kind of simple machine is a catapult?