Answer:
the unit of velocity is meter per second
An insulator is a material that does not allow a transfer of electricity or energy. Materials that are poor thermal conductors can also be described as being good thermal insulators.
<span>Answer:
I guess there is is a typo in your question both change in enthalpy and change in internal energy for the combustion are negative:
â†H = -5074 kJ
â†U = - 5084.2 kJ
Work done to surrounding in a process is given by the integral:
W = â« P dV from initial to final volume
for a constant pressure process the integral simplifies to:
W = P â™ â« dV = Pâ™â†V
Enthalpy is defined as:
H = U + Pâ™V
So the change in enthalpy and the change in internal energy are related as:
â†H = â†U + â†(Pâ™V)
for a constant pressure process:
â†H = â†U + Pâ™â†V
Hence,
â†H = â†U + W
=>
W = â†H - â†U
= -5074 kJ - (-5084.2) kJ
= 10.2 kJ</span>
P = absolute pressure in gas container connected to open-end U-tube = 116 kPa = 116000 Pa
we know that, 1 atm = 101325 Pa and 1 atm = 760 mm of Hg , hence
P = 116000 Pa (1 atm/101325 Pa) (760 mm of Hg/1 atm)
P = (116000 x 760/101325) mm of Hg
P = 870.07 mm of Hg
P₀ = atmospheric pressure = 752 mm Hg
Level of mercury is given as
P' = P - P₀
inserting the values
P' = 870.07 - 752
P' = 118 mm
so correct choice is
d. be 118 mm higher in the arm open to the atmosphere.
