A car travels first 30 km at a uniform speed of 20 km /hr and went 30 km at a uniform speed of 40 km/hr
Find its average speed in km/hr

So, the time required by the car to cover 30km at the uniform speed of 40 km/hr is =3040 hours. Again, the time required to cover the last 30 km at the uniform speed of 20 km/hr is =3020 hours.

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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:

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask