Review Problems 1-85 A hydraulic lift is used to lift a weight. The diameter of the piston on which the weight to be placed is to be determined. Assumptions 1 The cylinders of the lift are vertical. 2 There are no leaks. 3 Atmospheric pressure act on
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The amount of energy needed to raise the temperature of a
unit mass of a substance by one degree is called the specific
heat at constant volume cv for a constant-volume process and
the specific heat at
ENERGY, ENERGY TRANSFER, AND GENERAL
Forms of Energy
2-1C In electric heaters, electrical energy is converted to sensible internal energy.
2-2C The forms of energy involved are electrical energy and sensible internal energy.
3-61 The properties of compressed liquid water at a specified state are to be determined using the
compressed liquid tables, and also by using the saturated liquid approximation, and the results are to be
Analysis Compressed liquid can be a
Chapter 3 PROPERTIES OF PURE SUBSTANCES
Pure Substances, Phase Change Processes, Property Diagrams 3-1C Yes. Because it has the same chemical composition throughout. 3-2C A liquid that is about to vaporize is saturated liquid; otherwise it is compress
RCT - 3
1. A 2.5 kJ of work is to be delivered 3. A rigid tank is connected by a valve
to a piston cylinder device with zero
on a rod from a pneumatic piston.
clearance. The tank contains 0.4m3
If the air pressure is limted to 500