Consider a sealed can that is filled with refrigerant-134a. the contents of the can are at the room temperature of 25°c. now a leak develops, and the pressure in the can drops to the local atmospheric pressure of 100 kpa. the temperature of the refrigerant in the can is expected to drop to (rounded to the nearest integer) (a) o°c (b) -26°c (4) -18°c (d) 3°c (el25°c

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.