Answer Explanation:
CASCADE REFRIGERATION SYSTEMS :
cascade refrigeration systems are commonly used in the liquefaction of natural gas and some other gases
- cascade refrigeration system is also known as freezing system. It uses two types of refrigerants having different boiling points.
- this system is employed to obtain temperature of -40 to -80
- It allows stable ultra low temperature operation
examples of cascade refrigeration system: LNG (Liquefied natural gas ) plants mostly used cascade refrigeration system
ADVANTAGES OF CASCADE REFRIGERATION SYSTEMS:
- energy is saved because the system allows the use of refrigerant gases
- the running cost is inexpensive
- repair is easy
Short ones are 4.5 inches but long ones can be up to 8 inches.
they can make objects start moving
they can make objects move slower
they can make objects move faster
they can make objects stop moving
they can make object change direction
Answer:
100 mA (1 A) because a current between 1 A - 4.3 A causes muscle contractions