Answer:
in this situation I would a little bold
Explanation:
first I don't know what extinguisher I would use pretty much any that helps with fires. I'll back people up, take the hood and put it on the small fire that way it will light out more and if I open the hood and there still a little fire I would use the extinguisher and no one gets hurt :)
That all angles are the same in degress
13. D
14. A
15. C
16. B
17. F
18. E
Answer: The empirical formula for the given compound is
Explanation : Given,
Percentage of C = 84.4 %
Percentage of H = 15.6 %
Let the mass of compound be 100 g. So, percentages given are taken as mass.
Mass of C = 84.4 g
Mass of H = 15.6 g
To formulate the empirical formula, we need to follow some steps:
Step 1: Converting the given masses into moles.
Moles of Carbon =
Moles of Hydrogen =
Step 2: Calculating the mole ratio of the given elements.
For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 7.03 moles.
For Carbon =
For Hydrogen =
Step 3: Taking the mole ratio as their subscripts.
The ratio of C : H = 1 : 2
Hence, the empirical formula for the given compound is
Given parameters:
duration of fall = 6s
Unknown:
Speed of the rock before it hits the ground = ?
Solution:
To solve this problem, we apply one of the appropriate motion equations;
V = u + gt
Where V is the final velocity
u is the initial velocity
t is the time taken
g is the acceleration due to gravity = 9.8m/s²
The initial velocity is 0;
So;
V = gt
Input the parameters and solve for V;
V = 9.8 x 6 = 58.8m/s
The velocity before hitting the ground is 58.8m/s