If you were suddenly placed at an altitude of 100 kilometers (62 miles) above the earth, would you expect your stomach to expand or contract? explain why.

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Is a copper wire a conductor or insulator?

Scientists and engineers design new technologies to solve problems. often, a new technological design will contain a flaw. which of the following is true about such a flaw? a. it should be studied so that the design can be fixed or a new design can be proposed. b. it means that the problem being investigated cannot be solved. c. it means that the people who proposed the design should not be scientists or engineers. d. it makes the technological design useless.