The efficiency of an average gasoline-powered car is about 20%. This means A. the gas tank needs to be 20% filled with gasoline for motion.
B. the car uses 80% of the energy stored in the gasoline for motion.
C. the car uses 20% of the energy store in the gasoline for motion.
D. the car wastes 20% of the energy stores in the gasoline.

This means C.the car uses 20% of the energy store in the gasoline for motion.

Explanation:

I hope this helps.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.