The gases in a can of compressed air are at a temperature of 278.3k and a pressure of 214.2. If the gases in the can reach a pressure of 888.3 the can will explode what temperature would the can need to be heated up to for it to explode

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

i'm pretty sure its b i might be wrong though!