1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elden [556K]
3 years ago
10

A gas undergoes a process in a piston–cylinder assembly during which the pressure-specific volume relation is pv1.1 = constant.

The mass of the gas is 0.4 lb and the following data are known: p1 = 160 lbf/in.2, V1 = 1 ft3, and p2 = 300 lbf/in.2 During the process, heat transfer from the gas is 2.1 Btu. Kinetic and potential energy effects are negligible. Determine the change in specific internal energy of the gas, in Btu/lb.
Physics
1 answer:
Sati [7]3 years ago
8 0

Answer:

\Delta u = 53.99 Btu/lbm

Explanation:

given data:

P_1 = 160 lbf/in^2 = 23040 lbf/ft^2

P_2 = 300 lbf/in^2 = 56160 lbf/ft^2

V_1 = 1ft^3

Q = - 2.1 Btu

PV^{1.1} = constant

P_1V_1^{1.1} = P_2V_2^{1.1}

V_2 = V_1 [\frac{P_1}{P_2}]^{1.1}

       =  1 [\frac{23040}{56160}]^{\frac{1}{1.1}

       = 0.44 ft^3

work done during polytropic process

w = \frac{P_2V_2 - P_1V_1}{1-n}

   = \frac{56160 \times 0.4759 - 23040\times 1}{1 - 1.2}

   = -18442.1 ft lbf

we know 1 Btu = 778.169 ft. lbf, therefore

w = -23.6993 Btu

Q = W + m\Delta u

-2.1 = - 23.6993 + 0.4 \Delta u

\Delta u = 53.99 Btu/lbm

You might be interested in
Please help me with this question
snow_lady [41]

politics. Famous possible eg is of Werner Heisenberg in WW2. He delayed German attempt to build a nuclear bomb. US did build one ... hiroshima and nagasaki.

debbie may have got skilfully lucky by trial and error

6 0
3 years ago
Read 2 more answers
A lens is designed to work in the visible, near-infrared, and near-ultraviolet. The best resolution of this lens from a diffract
Anestetic [448]
In the near ultraviolet
8 0
3 years ago
what is the average speed of (a) a car that travels 400m in 20s. and (b) an athlete who runs 1500m in 4 minutes​
zmey [24]

Answer:

a) 20 m/s

b) 37.5 m)s

Explanation:

Average speed = total distance ÷ total time

=> (a) average speed of a car that travels 400m in 20s

= 400/20 = 20 m/s

& (b) average speed of an athlete who runs 1500m in 4 minutes (or 4×60=240 seconds)

= 1500/240 = 37.5 m/s

5 0
3 years ago
A wave travels through a medium and displaces the particles perpendicular to the direction in Wich the wave is traveling . This
lianna [129]
Transverse waves travel through a medium and cause particles perpendicular to the direction.
3 0
4 years ago
In both ionic and molecular bonds, the resulting compound is stabilized because
frosja888 [35]

Answer: In both ionic and molecular bonds, the resulting compound is stabilized because each atom's outer electronic orbital is full.

Explanation:

Molecular bonds are also called covalent bonds. A covalent bond is formed by sharing of electrons between two or more atoms.

For example, atomic number of hydrogen is 1 and atomic number of nitrogen is 7 (2, 5). In order to attain stability hydrogen atom needs to gain one electron whereas nitrogen needs to gain 3 electrons.

Hence, 3 atoms of hydrogen chemically combine with one atom of nitrogen by sharing electrons and thus it forms the compound NH_{3}.

Ionic bonds are the bonds formed by transfer of electrons from one atom to another.

For example, atomic number of sodium is 11 (2, 8, 1) and atomic number of chlorine is 17 (2, 8, 7). In order to attain stability sodium needs to lose one electron whereas chlorine needs to gain one electron.

Hence, when sodium combines chemically with chloride then sodium will transfer its 1 valence electron to the chlorine atom and thus it forms the compound NaCl.

Therefore, we can conclude that in both ionic and molecular bonds, the resulting compound is stabilized because each atom's outer electronic orbital is full.

7 0
3 years ago
Other questions:
  • Which is a characteristic of all waves?
    13·2 answers
  • A spinning coil of wire is what moves the cone in a speaker, producing the sound. True/False
    8·2 answers
  • Your friend asks you for a glass of water and you bring her 5 millilitersof water. Is this more or less than what she was probab
    6·1 answer
  • Two bicyclists , starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 10
    10·1 answer
  • Why do the positions of stars change in the universe?
    7·1 answer
  • can someone help me? i need to make a electromagnetic spectrum but i have no idea how can someone help me?
    5·1 answer
  • Como surgiu a capoeira?
    9·1 answer
  • Assume that Michael's teacher has a rule that if a student talks out-of-turn three times in one day, that student must stay in f
    9·1 answer
  • 7. In what ways has science harmed us?​
    5·1 answer
  • A current-carrying gold wire has diameter 0.88 mm. The electric field in the wire is0.55 V/m. (Assume the resistivity ofgold is
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!