*13 points* asap im on a time limit ; -; will mark brainliest what is the density of a sample that has a volume of 8cm cubed and a mass of 45g? show all steps

Aparticle moves according to a law of motion s = f(t), 0 ≤ t ≤ 12, where t is measured in seconds and s in feet. f(t) = cos(πt/6) (a) find the velocity at time t (in ft/s).

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.