Answer:
![P_{2} = 3.259\,atm](https://tex.z-dn.net/?f=P_%7B2%7D%20%3D%203.259%5C%2Catm)
Explanation:
Let suppose that air inside the tire behaves ideally. The equation of state for ideal gases is:
![P\cdot V = n\cdot R_{u}\cdot T](https://tex.z-dn.net/?f=P%5Ccdot%20V%20%3D%20n%5Ccdot%20R_%7Bu%7D%5Ccdot%20T)
As tire can be modelled as a closed and rigid container, there are no changes in volume and number of moles. Hence, the following relationship is constructed:
![\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}](https://tex.z-dn.net/?f=%5Cfrac%7BP_%7B1%7D%7D%7BT_%7B1%7D%7D%20%3D%20%5Cfrac%7BP_%7B2%7D%7D%7BT_%7B2%7D%7D)
The final pressure is:
![P_{2} = \frac{T_{2}}{T_{1}}\cdot P_{1}](https://tex.z-dn.net/?f=P_%7B2%7D%20%3D%20%5Cfrac%7BT_%7B2%7D%7D%7BT_%7B1%7D%7D%5Ccdot%20P_%7B1%7D)
![P_{2} = \frac{298.15\,K}{278.15\,K}\cdot (3.04\,atm)](https://tex.z-dn.net/?f=P_%7B2%7D%20%3D%20%5Cfrac%7B298.15%5C%2CK%7D%7B278.15%5C%2CK%7D%5Ccdot%20%283.04%5C%2Catm%29)
![P_{2} = 3.259\,atm](https://tex.z-dn.net/?f=P_%7B2%7D%20%3D%203.259%5C%2Catm)
101.59164 Kilopascal (kPa)
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
Answer:
The molar mass of carbon
Explanation:
Before the mass (in grams) of two moles of carbon can be determined, <u>the molar mass of the element would be needed.</u>
<em>This is because the number of mole of an element is the ratio of its mass and the molar mass</em>. That is,
number of mole = mass/molar mass
Hence, the mass of elements can be obtained by making it the subject of the formular;
mass = number of mole x molar mass
<em>Therefore, the molar mass of carbon would be needed before the mass of 2 moles of the element can be determined.</em>
Answer:
b. d. f. h
Explanation:
Anions are negatively charged. They are usually non metals with few exceptions. They need to gain electrons in order to form and they are always listed after cation in a compound.