a student learns that the sun is classified as a medium-size star and that many stars are much bigger and brighter. however, the student observes that other stars look very dim, even through a telescope. why do other stars look much dimmer than the sun?

The slotted link is pinned at o, and as a result of rotation it drives the peg p along the horizontal guide. compute the magnitude of the velocity and acceleration of p along the horizontal guide. compute the magnitudes of the velocity and acceleration of p as a function of θ if θ=(3t) rad, where t is measured in seconds.

What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?

What is the relationship between ozone and smog?