B. 2 Km North, displacement is basically how far form the original place
Answer:
B. The English system is preferred for use in the scientific and technical communities due to its ease of us of the SI system
Explanation:
This is true due to the the fact that in the English system, all you have to do to change from one measurement to the other is just move the decimal place. For example: I have 10 kg of apples and wish to convert it into grams, kilo means 1000 and grams are the base, meaning one, so we will move the decimal place to the right three places (to add the three zeros for 1,000) and the answer will 10,000. Hope you read through this and somewhat get what I mean.
Answer:

Explanation:
The computation of acceleration of the particle down the slope is shown below:-
data provided in the question
Particle of mass = 1.3 kg i,e sliding down
Inclined = 30 to the horizontal
based on the above information
Force is given by
............ 1
and sliding force is given by



= 
Hence, the acceleration of the particle down the slope is 4.9 m/sec^2
Cheimcal engery is related to positions of atoms within molecules..