A 23∘C, una varilla mide exactamente 24.15cm de largo según una regla de acero. Tanto la varilla como la regla se ponen en un horno a 285∘C donde la varilla mide ahora 24.24cm según la misma regla. ¿Cuál es el coeficiente de expansión térmica para el material de la varilla? ( αacero=11×10−6/C∘ )

Diamond will scratch quartz. true or false

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s