Answer:
A. Fluorine
Explanation:
This is because it has the smallest atomic radius.

Time = 13.5 / 2.5 = 5.4 seconds
Answer
Given,
Energy absorbed, 
Energy expels,
Temperature of cold reservoir, T = 27°C
a) Efficiency of engine



b) Work done by the engine



c) Power output
t = 0.296 s



Answer:
B.will increase the maximum static friction between the box and the floor
Explanation:
Because static friction is the force that keeps an object at rest