Ablock with mass of 5 kg is forced against a horizontal spring of negligible mass. the spring is compressed a distance of 420 m. the force constant k of the spring is, k = 90 n/m. the spring and bax are released from rest, after 420m when the box reaches its equilibrium point the box loses contact with the spring and slides along a horizontal surface that has some friction: µ-0.15 part 1.what is the speed of the box the instant it leaves the spring? give your answer to 4 significant digits. part 2. how far does the box travel from release before it comes to a stop? give your answer to 2 significant digits.

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.