A cube has a volume of 8.0 cm3 and a mass of 21.6 grams. ... using an electronic analytical balance. ... graduated cylinder ... The density of iron is 7.87 g/mL.
Answer:
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Explanation:
<u>Given:</u>
Moles of gas, n = 1.50 moles
Volume of cylinder, V = 15.0 L
Initial temperature, T1 = 100 C = (100 + 273)K = 373 K
Final temperature, T2 = 150 C = (150+273)K = 423 K
<u>To determine:</u>
The pressure ratio
<u>Explanation:</u>
Based on ideal gas law:
PV = nRT
P= pressure; V = volume; n = moles; R = gas constant and T = temperature
under constant n and V we have:
P/T = constant
(or) P1/P2 = T1/T2 ---------------Gay Lussac's law
where P1 and P2 are the initial and final pressures respectively
substituting for T1 and T2 we get:
P1/P2 = 373/423 = 0.882
Thus, the ratio of P2/P1 = 1.13
Ans: The pressure ratio is 1.13
Heat can be transferred from one object to another in 3 different ways.
1) Conduction : This is the mode of transfer of heat through solid medium.
Example : A metal rod getting hot when hold over a flame.
2) Convection : This is the mode of transfer of heat through liquids
Example : Boiling of water.
3) Radiation : This type of heat transfer does not require any medium.
Example : When we stand close to a campfire, we feel warmer. Here the heat travels through air.
In the given problem, when a person gets into a car with hot black leather, his skin comes in contact with the hot object. Here the heat gets transferred through the skin which is a solid medium.
Therefore this is an example of conduction.
Photovoltaic cell is the correct answer ,it converts sunlight into electricity.Hope this helped!
