There are several important applica tions of the principle of expansion of solids due to heating the solid. one appli- cation is found in the type of there mometer called a thermocouple. if strip of metal is heated, it will expand. some metals will expand more than others for the same amount of heat, each metal has definite expansion for a specific amount of heat. therefore, if two different metal strips are bound together and the single strip of metals will tend to assume curved position because of the greater expansion of one metal as compared to the other. this curvature can make con tact with an electrical circuit, starting an electric motor or operating some other electromechanical device. in the home a thermocouple stops or starts the oil burn- er in accordance with the room tempera- ture. the temperature of a gasoline engine can be measured with a device similar to a thermocouple.
1.) a thermocouple
a.) creates heat
b.) creates electricity
c.) makes or breaks contact
d.) cannot work automatically
2.) the reader can infer that a thermocouple will not work when
a.) the 2 metals are very long
b.) both metals are 4 inches think and 1 inch long
c.) one metal is thicker than the other
d.) the 2 metals are is different lengths

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)

in the door-way, with his head in the room and with a lantern in hand with the most slight ray of light shining from it; so small and opening it so slowly to not disturb the old mans sleep.

i have watched the play of this story last friday.