Which are the components of a typical refracting telescope? hints?

If y gets smaller as x gets bigger and y have an relationship?

One number is said to be an "order of magnitude" larger than another number if choose one: a. it is 10 times larger. b. it is 5 times larger. c. it is 3 times larger. d. it is 100 times larger. e. it is 2 times larger.

Amaterial that provides resistance to the flow of electric current is called a(an) (1 points)