<h2>
Answer:</h2>
<h2>
Explanation:</h2>
<em>Since I don't have access to "Appendix A", I'll solve the problem using data from the periodic table.</em>
<em />
<h3>1. Determine the molar mass of iron.</h3>
<em>According to the periodic table, the molar mass of iron is:</em>
55.845g/mole.
<h3>2. Convert 1 tonne to grams.</h3>
<h3>3. Apply rule of 3.</h3>
----------- 
----------- 
<h3>4. Determine the amount of atoms.</h3>
<em>Considering that there are, approximately, </em>
atoms in a mole of any element, apply another rule of 3.
1 mole --------------------- 
--------------------- x
.
Answer:
The work done or the heat transfer for air and hydrogen are 91.71 kj/kg and 1317.89 kj/kg respectively.
Explanation:
Given:
Initial pressure is 7.6 bar.
Initial temperature is 77 °C.
Final pressure is 3.05 bar.
Calculation:
(a)
Take air as an ideal gas with gas constant 0.287 kj/kgK.
Step1
For isothermal process work done and heat transfer is the same because of no change in internal energy.
Work done is calculated as follows:
W = 91.71 kj/kg.
Thus, the work done or the heat transfer for isothermal process is 91.71 kj/kg.
Step2
For isothermal process work done and heat transfer is the same because of no change in internal energy. Take Hydrogen as an ideal gas with gas constant 4.1242 kj/kgK.
Work done is calculated as follows:
W = 1317.89 kj/kg.
Thus, the work done or the heat transfer for isothermal process is 1317.89 kj/kg.
Answer:
The correct option is: (b) Shearing stress
Explanation:
The shear stress is described as the force that results in the deformation of an object or substance. It originates from the vector of the force component that is parallel to area of cross section of the object or substance.
The paired shear forces that produces shear stress, act equally on the opposite sides of the given object.
<u>In the given example, the stress produced when using scissors for cutting, is known as the shear stress.</u>
Answer:
Opportunity cost she loses the chance to get the degree. The trade- off is she gets to start a business.
Explanation:
Answer:
Some of the demerits or disadvantages of using a very slow castings rates in production of metal by the method of casting includes, with the solidification of metal, it may begin even before the mold is filled fully, which may result in defects such as shrinkage.
Secondly, the rate of slow casting will create castings that have a grain coarse structure that will affect the strength of the castings.
Explanation:
Solution
The disadvantageous of slow casting rates in the production of metals by casting method is explained below:
(1) The solidification of metal may start even before the mold is filled completely, which may create or produce defects such as mis-runs and shrinkage and shrinkage cavity.
So, the slow cavity rate will produce partial and incomplete castings
(2) Slow casting rate will produce castings which have a coarse grain structure which therefore affects the strength of the castings adversely.
