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.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?

Which radioisotope is used in dating geological formations?