Here are three displacements, each in meters: d1 = 1.5i + 1.8j - 5.0k, d2 = -1.0i + 2.0j + 3.0k, and d3 = 4.0i + 3.0j + 2.0k. what is r = d1 - d2 + d3 ((a), (b) and (c) for i, j and k components respectively)? (d) what is the angle between r and the positive z axis? (e) what is the component of d1 along the direction of d2? (f) what is the component of d1 that is perpendicular to the direction of d2 and in the plane of d1 and d2?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

Sound is a disturbance that travels through a medium as a