What is a disadvantage of using nonrenewable energy resources?

a. they cannot be replenished in human lifetime

b. they are readily available

c. they cause problems with bird populations

d. they do not produce greenhouse gases

Asample of a gaseous substance changes into liquid. this process is called (blank) and it takes place when heat is (blank) a gaseous system

Which feature of a heating curve indicates a change ofn state

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?