There have been several proposed atomic models during the last 150 years. which model best illustrates the bohr model. this model suggests that an atom's electrons orbit the nucleus in fixed patterns, much like the planets orbit the sun.

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

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.