Answer:
The explanations are provided below.
Explanation:
a) The accelerated thermal cycling test is a test that is performed to evaluate the fatigue strength of electronic solder connections. The glass transition temperature given as 
is a frequently used parameter to test the degree of cure of an epoxy encapsulant.
b) The Coefficient of Thermal Expansion of Encapsulant
This is an important parameter to prevent crackling. Crackling occurs when a joint is subjcted to high temperatures during reflow soldering. Thus, the property is important in determining the limits of the joint.
Answer:
Explanation:
Density is defined as mass ler unit volume, expressed as
Where m is mass, 
is density and v is the volume. For a sphere, volume is given as
Replacing this into the formula of density then
Given diameter of 2.24 in then the radius is 1.12 in. Substituting 0.82 lb for m then
Answer:
three main parts
Explanation:
Electric motor designs can vary quite a lot, though in general they have three main parts: a rotor, a stator and a commutator. These three parts use the attractive and repulsive forces of electromagnetism, causing the motor to spin continually as long as it receives a steady flow of electric current.
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Answer:
Explanation:
The concept of heat transfer is applied, by first equation the heat generated to the heat trasnfer by convection to get the temperature of the outer surface.
Also equating the head conducted to the heat generated to get the temperature of the inside surfaces. Tthe steps and detailed calculations is as shown in the attachment.
