The refrigerant in an absorption chiller whose source of energy is steam or hot water is ____________________.
Fill in the blank(s) with the appropriate word(s).
water
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Electromagnetism is responsible for creating the rotation of the armature in an electric motor.
Answer the following statement true (T) or false (F)
Defective ball joints can cause all of the following problems EXCEPT ________
A) Shimmy-type vibration felt in the steering wheel B) Vehicle wander on a straight road C) Loud popping or squeaking when driving over bumps D) All of these can be caused by defective ball joints
As brake fluid ages, what happens?
A) The color changes to purple B) The viscosity (thickness) decreases C) The boiling temperature decreases D) The boiling temperature increases
Let x[ n] be a signal and let 
If Y( e j? ) = cos( 2?), x[n] consists of exactly four discrete-time impulses. What are their strengths and locations?
What will be an ideal response?