Find the mass and center of mass of a wire in the shape of the helix x = t, y = 7 cos(t), z = 7 sin(t), 0 ≤ t ≤ 2π, if the density at any point is equal to the square of the distance from the origin. mass incorrect: your answer is incorrect. center of mass x, y, z = incorrect: your answer is incorrect.

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island