The rate constant for this second‑order reaction is 0.760 m−1⋅s−1 at 300 ∘c. a⟶products how long, in seconds, would it take for the concentration of a to decrease from 0.750 m to 0.330 m?

Will pushing on a car always change the cars mechanical energy? what must happen for the cars kinetic energy to increases?

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.