Physics, 16.11.2019 05:31 Multidewi3540

Apump is driven by a 2-kw motor with water at 150 kpa, 10 cesius entering. find the maximum water flow rate you can get with an exit pressure of 1 mpa and negligible kinetic energies. the exit flow goes through a small hole in a spray nozzle out to the atmosphere at 100 kpa. find the spray velocity.

Answers: 2

Show answers

Answers

Answer from: rowellr3

42.4m/s

Explanation:

To develop the problem it is necessary to apply the concepts related to thermodynamic work and Bernoulli's principle in which the behavior is described of a liquid moving along a stream.

The work of an incomprehensible liquid is given by the equation,

$\dot{W} = \dot{m}w = -\dot{m}\upsilon (P_e-P_i)$

Where,

$\dot{m}$ = Mass flow

$\upsilon$ = Specific Volumen

P = Pressure

Our values are given by,

$\dot{W}$ = 2kW

$P_i = 150kPa\\P_f = 1000kPa\\P_e = 100kPa$

$\upsilon = -0.001000 m^3/kg \rightarrow$ Table 1 for saturated water in 10°C

We need to find the mass flow, then re-arrange for $\dot{m}$

$\dot{m} = \frac{\dot{W}}{-\upsilon(P_f-P_i)}$

$\dot{m} = \frac{-2}{-0.001000(1000-150)}$

$\dot{m} = 2.356kg/s$

To find the Spray velocity, we apply Bernoulli equation, because at the Nozzle there is not Work or Heat transfer related. Then,

$\frac{1}{2}V^2 = \upsilon \Delta P$

$V = \sqrt{2*\upsilon(P_e-P_i)}$

$V = \sqrt{2*0.001003(1000-100)}$

V = 42.4m/s

Therefore the spray velocity is 42.4m/s

Apump is driven by a 2-kw motor with water at 150 kpa, 10 cesius entering. find the maximum water fl

Answer from: Quest

quantum mechanics or quantum physics is physics of very small objects (particles) and physical entities.

quantum physics has some parallels to our macro world and some pretty unique ideas which theoretically and mathematically proven to be true even though we will never be able to access them because of our size.

there are many types of particles: subatomic, elementary etc.

subatomic means they are smaller than atom, elementary means they are at the very basis of everything.

subatomic particles are for eg. protons, neutrons but not electrons.

elementary particles are categorised into 3 groups by what they do.

these 3 groups are quarks, leptons and bosons.

light for example is a particle more precisely a photon a part of leptons.

proton (subatomic particle) is made out of 2 up quarks and 1 down quark each of these has a fractional charge like $\frac{1}{3}$ . (i crazy)

most famous scientist who contributed to this physics are:

max planckalbert einsteinerwin schrödingermany

the topic itself us understand a lot and will probably be vastly used in the future (quantum computers, understanding the big bang,

we also must not forget quantum effects like:

superposition (where 1 thing can be this and that at the same time),entanglement (where two particles are seemingly connected by some sort of unknown (or known) force, energy, matter (i know all that can be the same at least it was at the beginning)

and there is more. but probably too much for this answer to be consistent due to my average understanding of this topic.

hope this you understand quantum mechanics a little more. i'm not an expert in the topic (so don't be like wth if you are an expert) but i'm very interested in it.

anyways quantum physics is a very hard topic (harder than physics (perhaps)) therefore searching for every information there is about it and learning it is unfortunately impossible (you can only specialise into 1 - 3 things or more (perhaps

have fun and i wish you luck!

r3t40

Answer from: Quest

hey , the answer is c

Another question on Physics

Physics, 21.06.2019 17:40

Sarah and michelle work at a tech company that designs exercise apps. sarah tells michelle she has heard that james, their supervisor, interviewed with a competitor and may be leaving the company, which would open up a management position. what kind of power is sarah exerting?

Answers: 1

Answer

Physics, 21.06.2019 18:40

Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear

Answers: 3

Answer

Physics, 21.06.2019 23:30

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

Answers: 3

Answer

Physics, 22.06.2019 17:30

Does heating a metal wire increase or decrease its electrical resistance? why?

Answers: 1

Answer

You know the right answer?

Apump is driven by a 2-kw motor with water at 150 kpa, 10 cesius entering. find the maximum water fl...

Questions