Answer:
F = 518.4 KN
Explanation:
From work energy theorem;
Energy = workdone
In this case, Energy is kinetic energy and has a formula ½mv²
Thus;
Fd = ½mv²
We are given;
Mass of car; m = 1600 kg
Speed of car after crash; v = 18 m/s
Distance from dummy to steering wheel; d = 0.5 m
Thus;
½ × 1600 × 18² = F × 0.5
This gives;
800 × 324 = 0.5F
F = 800 × 324/0.5
F = 518400 N
F = 518.4 KN
Answer:
87.9%
Explanation:
Percentage yield= (actual yield)/(theoretical yield)×100
Let theoretical yield= molar mass of CaCl2= 40+35.5+35.5=111
%yield= 97.6/111 ×100
= 87.9%
I think the answer is choice A. I'm not completely sure if i'm right please let me know if i'm not. Hope it helped and have a great day.
Curiosity because they are eager to find out information
I am pretty sure this is a demonstration. A demonstration is a method of experiment that had only been done once, while an experiment is a method that has been done repeatedly. Hope this helps!