A block of mass M1 on an inclined plane of angle θ is connected by a cord over a frictionless pulley to a second block of mass M2 hanging vertically. The pulley rotates and has the shape of a uniform solid disk of mass Mp and radius Rp (moment of inertia of pulley Ip= ½ MpRp^{2} ). The M2 block is moving downward and the M1 block is moving up the incline, both with the acceleration of a = g/5. Calculate the coefficient of kinetic friction between the M1 block and the incline.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

365.25 earth days are in the year of a light year