Answer:
average for silk =141"
average for cotton =96"
average for nylon = 70"
if you desire a slower falling parachute to protect the body from damage,
silk is the best
if you desire a faster falling parachute to escape enemy bullets,
nylon is the best
Explanation:
Homework 1
Problem Solving
1. Kelvin and Xavier were doing an investigation on parachutes. One of them suggested that the type of material the parachute was made from had an effect on how long it took to reach the ground. Their results are given in
the table below.
(a) Calculate the average time in seconds for each material.
Time taken for parachute to reach the ground (seconds)
MATERIAL
1st TRY
2nd TRY
3rd TRY
AVERAGE
Sik
144
140 average of 3 = 141
139
Cotton
98
96 average of 3 = 96
94
Nylon
72
68 average of 3 = 70
70
Can you please post the whole question and show the prism as well?
ANSWER
The number of moles of oxygen formed is 7.06 moles
EXPLANATION
Given that
The number of moles of mercury (II) oxide is 14.12 moles
Follow the steps below to find the number of moles of oxygen
Step 1; Write the balanced equation for the decomposition of the reaction
In the reaction above, 2 moles HgO decompose to produce 2 moles Hg and 1 mole O2
Step 2; Find the number of moles of oxygen using a stoichiometry ratio
Let x represents the number of moles of oxygen
Therefore, the number of moles of oxygen formed is 7.06 moles
Answer is: quantity of sulfur is 13 tons.
Chemical reaction: S(s) + O₂(g) → SO₂(g).
From chemical reaction: n(S) : n(SO₂) = 1 : 1.
n(S) = n(SO₂); amount of substance.
m(S) ÷ M(S) = m(SO₂) : M(SO₂).
m(S) : 32 g/mol = 26 t : 64 g/mol.
m(S) = (32 g/mol · 26 t) ÷ 64 g/mol.
m(S) = 13 t = 13000 kg; mass of sulfur.