To improve the acoustics in an auditorium, a sound reflector with a mass of 170 kg is suspended by a chain from the ceiling. what is the tension in the chain? assume that the mass of the chain itself is 8.0 kg.

What is the role of the ocular lens?

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

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?