If every 10th student on a non alphabetized list of names was choose from your school to answer a survey, this group would be a

A. independent sample

B. random sample

C. blased sample

D. experimental sample

Which interaction of nature is weakest? a. strong c. electromagnetic b. weak d. gravitational

Under what circumstances will light display total internal reflection?

Which of the following is true about a combustion reaction? a. It is an endothermic reaction. C. CO2 and H20 are produced. b. Oxygen must be a reactant. d. All of the above.

Each of the objects below is dropped from the same height. which one would be least affected by air resistance?

Which type of heat source is the cleanest? A. open fireplace B. wood stove C. hot water radiant heat

Can an object travel at the speed of light? Why or why not?

Determine the amount of potential energy of a 5 Newton's book that is moved to three different shelves on a bookcase. The height of the shelves is 1.0 meter, 1.5 meter, and 2.0 meter

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present

Danilo is sliding down a slide. What forces are acting on him as he slides