問題一覧
1
The ___ of any substance is its mass per unit volume
density
2
work done for a constant volume process
zero
3
process where there is no heat added or subtracted from the air
adiabatic process
4
turbojet engine operates on
brayton cycle
5
reversible adiabatic process
isentropic
6
correct gas constant for air
287.08J/kgK
7
heat flows from areas of ____ to areas of ____
High Temp, Cold Temp
8
force is directly proportional to the product of mass and acceleration
newton's 2nd law of motion
9
if heat is said to be carried away from the system, the sign of heat will be
negative
10
if work is done by the system, the sign of work will be
positive
11
if the pressure on a particular quantity of gas is held constant, then, with any change of state, the volume will vary directly as the absolute temp.
charle's law
12
if both the volume and the absolute temp. of a confined gas are doubled, the pressure will ____
not change
13
branch of the physical sciences that treats of various phenomena of ____
energy
14
inverse of density
specific volume
15
sum of internal energy and flow work
enthalpy
16
"the acceleration of a particular body is directly proportional to the resultant force acting on it and inversely proportional to its mass."
2nd law
17
states that energy is neither created nor destroyed
1st law of thermodynamics
18
result in system having potential energy
elevation
19
sum of potential and kinetic energy
internal energy
20
measures atmospheric pressure
barometer
21
heat being added to the system
endothermic
22
unit of work
kg m^2 / s^2
23
thermodynamic quantity representing the unavailability of a system's thermal energy
entropy
24
if the system is constant volume, the heat will be equal to
internal energy
25
if the system is constant pressure, the heat will be equal to
enthalpy
26
process where in the change in internal energy is equal to 0
isothermal
27
formula for the curve, polytropic
PVn=c
28
process where in the change in enthalpy is 0
isothermal
29
formula for curve isothermal process
PV=C
30
ideal prototype of spark ignition engines
otto cycle
31
total horsepower actually developed in an engine's cylinder without reference to friction losses
indicated horsepower
32
most efficient cycle conceivable
carnot cycle
33
fraction of the heat supplied to a thermodynamic cycle that is converted into work
thermal efficiency
34
a quantity relating to the operation of a reciprocating engine and is a measure of an engine's capacity
mean effective pressure
35
actual amount of power delivered to the propeller shaft
brake horsepower
36
power required to overcome the friction and energy losses
friction horsepower
37
ratio of clearance volume
clearance ratio
38
4 stroke cycle engine
diesel cycle
39
process in which a temperature-entropy (T-s) diagram is represented as a vertical line
isentropic
40
pressure is inversely proportional to the volume
isothermal
41
process where the pv diagram is horizontal
isobaric
42
formula for the curve of a polytropic
PVn=c
43
process where the non flow work is equal to 0
isometric
44
variable "n" for polytropic process
polytropic index
45
if n=0 for a polytropic process, the process will be?
isobaric
46
process where in the change in enthalpy is equal to 0
isothermal
47
formula for isothermal
PV=k
48
the area under the curve of PV diagram represents
PdV
49
isothermal process, heat is equal to
mc(T2-T1)
50
volume is directly proportional to the temperature
isobaric
51
same units
heat and work
52
if the change in kinetic energy is zero, the steady flow work is equal to
-SPdv
53
isentropic compression ratio and cutoff ratio
diesel cycle
54
better thermal efficiency
diesel cycle
55
formula equal to mRTIn (V1/V2) in isothermal
P1V1In (P1/P2)