At standard pressure (760 mm) water boils at 100c. a vacuum pump is used to reduce the ambient pressure above water under a sealed bell jar. by reducing the pressure, the boiling point is lowered so that the water begins to boil at room temperature. what is the approximate pressure at which water boils at room temperature (22c)?

Aballet student who learns with the of his instructor is demonstrating learning.

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 are two different ways you could find the value of a? explain these methods.