A0.05-m3 rigid tank initially contains refrigerant- 134a at 0.8 mpa and 100 percent quality. the tank is con- nected by a valve to a supply line that carries refrigerant-134a at 1.2 mpa and 40°c. now the valve is opened, and the refrig- erant is allowed to enter the tank. the valve is closed when it is observed that the tank contains saturated liquid at 1.2 mpa. determine (a) the mass of the refrigerant that has entered the tank and (b) the amount of heat transfer.

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explanation:

the warning light flashes for a second or two when the engine starts. if it stays on, there's must be something wrong with the coolant. you should never dare to continue driving when the light is on. pull over as soon as possible and shut the engine off.

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the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer:

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explanation: