Answer:
Electric engines have efficiencies of roughly 90% whilst combustion engines about 10% to 30%. This is because combustion engines emit much more heat, which is always energy that is not used as work, and thus increases inefficiency.
Explanation:
Circular lines on topographic map is called Contour lines these lines shown on two dimension map and depict elevation on the ground . the distance of each contour line is set to represent a certain level of elevation with zero being sea level . mostly map use distance between coutour lines is 10 m
for page two the answer is the first one
I think the answer is b because a reactant is the start of a chemical reaction and a product is the end of it.
Answer:
Explanation:
A is the correct representation because mass number is 15+16=31 and atomic number is 15 which is equal to number of electrons so its 31X15