Acoil visbreaker operates at 500°c for 1 min. how long will it take to achieve the same thermal severity at 450°c in a soaker visbreaking process? an apparent arrhenius activation energy for thermal cracking is given as 50 kcal/mol. show each step of calculations in your answer.

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

What is the role of lenses in microscopy?