Answer: 41 atm
Explanation:
Given that:
Original Volume of gas V1 = 2.9L
Temperature T1 = 32.7°C
Convert Celsius to Kelvin
(32.7°C + 273 = 305.7K)
Pressure P1 = 645.3 torr
New Volume V2 = 0.23 L
New temperature T2 = 894.7°C
Convert Celsius to Kelvin
(894.7°C + 273 = 1167.7K)
New pressure = ?
Then, apply the combined gas equation
(P1V1)/T1 = (P2V2)/T2
(645.3 torr x 2.9L)/305.7K = (P2 x 0.23L)/1167.7K
1871.37 / 305.7 = 0.23P2 / 1167.7
To get P2, Cross multiply
1871.37 x 1167.7 = 305.7 x 0.23P2
2185198.749 = 70.311P2
Divide both sides by 70.311
2185198.749/70.311 = 70.311P2/70.311
31079.045 torr = P2
Now, convert pressure in torr to atmosphere
Since 760 torr = 1 atm
31079.045 torr = Z
cross multiply
760 torr x Z = 31079.045 torr x 1 atm
Z = 31079.045 torr / 760 torr
Z = 40.89 atm (Round to the nearest whole number as 41 atm)
Thus, new pressure of gas is 41 atm
2.7 L in cm³ :
2.7 * 1000 = 2700 cm³
Weight = Volume * Density
2700 * 0.79 = 2133 g
1 Ibs = <span>453.59 g
2133 / 453.59 = 4.70 Ibs
hope this helps!</span>
Answer:
C. The fruit and the hamburgers were affected by an increase in heat energy.
Explanation:
One claim Harvey can use to support the examples from his experiment is that the hamburgers and fruits were affected by an increase in the heat energy.
- This chemical change is one that is solely driven.
- This action Harvey is carrying out is cooking
- When meals are cooked, the raw substances undergoes chemical change via the action of heat.
Explanation:
(Ques- A) Why does the first method for determining volume work only for a regular-shaped object?
<u>(Ans- A)</u> <em>Because the method requires precise dimensions of objects for result, which is not possible for irregular shaped objects.</em>
(Ques - B) Will the second method for determining volume work for any object or just an odd-shaped one? Why?
<u>(Ans-B)</u> <em>It will work for both regular and irregular shaped objects since both displace equal volumes of water.</em>
(Ques - C) Is one method of measurement more accurate than the other? Why or why not?
<u>(Ans-C)</u> <em>Both are pretty accurate, with some experimental errors which may creep in accidentally. </em>
(Ques- D) Would the displacement method of measurement work for a cube of sugar? What about a cork? Why?
<u>(Ans - D)</u> <em>No, the method would not work because sugar being soluble, will dissolve in water. </em>
<em>No, the method would not work because sugar being soluble, will dissolve in water. Cork is less dense than water so floats on it, with only part of it submerged in water, resulting in displacement of less volume of water than actual volume of Cork.</em>
(Ques-E) What did you find out from this investigation? Be thoughtful in your answer.
<u>(Ans- E)</u> <em>I learnt about determining volume of different objects from this investigation. </em>(Sorry, I know its not a very thoughtful answer)
Answer:
Conversion of kinetic energy to potential energy (chemo mechanical energy)
In the state of rest, the rubber is a tangled mass of long chained cross-linked polymer that due to their disorderliness are in a state of increased entropy. By pulling on the polymer, the applied kinetic energy stretches the polymer into straight chains, giving them order and reducing their entropy. The stretched rubber then has energy stored in the form of chemo mechanical energy which is a form of potential energy
Conversion of the stored potential energy in the stretched to kinetic energy
By remaining in a stretched condition, the rubber is in a state of high potential energy, when the force holding the rubber in place is removed, due to the laws of thermodynamics, the polymers in the rubber curls back to their state of "random" tangled mass releasing the stored potential energy in the process and doing work such as moving items placed in the rubber's path of motion such as an object that has weight, w then takes up the kinetic energy 1/2×m×v² which can can result in the flight of the object.
Explanation:
