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3 years ago

There are gauges available for checking panel flushness. TRUE OR FALSE?

Engineering

2 answers:

jolli1 [7]3 years ago

7 0

Answer: true

Explanation:

because flushness means your dead so you are dead now

Anit [1.1K]3 years ago

4 0

There are gauges available for checking panel flushness. to allow for front-to-back movement. to allow for side-to-side movement. for height adjustments. So yes it is true. Hope this helps!

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Viết một đoạn văn nói về tình bạn

inn [45]

Answer:

Một người bạn luôn quan trọng trong cuộc sống của chúng ta, và mọi người đều thích sự bầu bạn của một người bạn. Tình bạn thật sự rất khó để có được. Trải qua mọi khó khăn, thất bại, người bạn thủy chung sẽ luôn sát cánh. Họ sẽ quan tâm đến bạn mọi lúc, và có được một tình bạn đích thực là một món quà thực sự Có được một người bạn đồng hành trong cuộc sống của bạn là rất quan trọng. Một người có thể hiểu được cảm xúc của bạn, ủng hộ bạn và sát cánh bên bạn trong những lúc tốt và xấu ngay cả khi mọi người quay lưng lại với bạn, một người như thế thật đáng quý biết bao. Đây là người mà chúng tôi gọi là bạn thân nhất của mình.

Explanation:

I hope that helps you

7 0

3 years ago

The use of smart cranes enables transportation companies to do all of the following

IgorLugansk [536]

The use of smart cranes doesn't enable transportation companies to: B. Manually load or unload crates onto a train with several workers.

<h3>What is a smart crane?</h3>

A smart crane can be defined as a mechanical equipment that is designed and developed to automatically load, unload, or control the movement of heavy equipment (objects) from one point to another, especially through the use of a projecting arm or beam.

<h3>The use of smart cranes.</h3>

Generally, various transportation companies use a smart crane to achieve and perform the following tasks:

An ability to hire fewer workers to transport crates onto trains or haulage vehicles.

An ability to control the movement of heavy objects.

An ability to incorporate technological advancements into their routine work or daily practices.

Hence, the use of smart cranes by transportation companies completely abolishes the need to manually load or unload crates onto a train with several workers.

Read more on smart cranes here: brainly.com/question/25845985

3 0

2 years ago

Two balanced Y-connected loads in parallel, one drawing 15kW at 0.6 power factor lagging and the other drawing 10kVA at 0.8 powe

NemiM [27]

Answer:

(a) attached below

(b) $pf_{C}=0.85$ $lagging$

(d) $X_{C} =49.37$ Ω

(e) $I_{cap} =9.72 A$ and $I_{line} =27.66 A$

Explanation:

Given data:

$P_{1}=15 kW$

$S_{2} =10 kVA$

$pf_{1} =0.6$ $lagging$

$pf_{2}=0.8$ $leading$

$V=480$ $Volts$

(a) Draw the power triangle for each load and for the combined load.

$\alpha_{1}=cos^{-1} (0.6)=53.13$ °

$\alpha_{2}=cos^{-1} (0.8)=36.86$ °

$S_{1}=P_{1} /pf_{1} =15/0.6=25 kVA$

$Q_{1}=P_{1} tan(\alpha_{1} )=15*tan(53.13)=19.99$ ≅ $20kVAR$

$P_{2} =S_{2}*pf_{2} =10*0.8=8 kW$

$Q_{2} =P_{2} tan(\alpha_{2} )=8*tan(-36.86)=-5.99$ ≅ $-6 kVAR$

The negative sign means that the load 2 is providing reactive power rather than consuming

Then the combined load will be

$P_{c} =P_{1} +P_{2} =15+8=23 kW$

$Q_{c} =Q_{1} +Q_{2} =20-6=14 kVAR$

(b) Determine the power factor of the combined load and state whether lagging or leading.

$S_{c} =P_{c} +jQ_{c} =23+14j$

or in the polar form

$S_{c} =26.92$ °

$pf_{C}=cos(31.32) =0.85$ $lagging$

The relationship between Apparent power S and Current I is

$S=VI^{*}$

Since there is conjugate of current I therefore, the angle will become negative and hence power factor will be lagging.

Current of the combined load can be found by

$I_{C} =S_{C}/\sqrt{3}*V$

$I_{C} =26.92*10^3/\sqrt{3}*480=32.37 A$

(d) Δ-connected capacitors are now installed in parallel with the combined load. What value of capacitive reactance is needed in each leg of the A to make the source power factor unity?Give your answer in Ω

$Q_{C} =3*V^2/X_{C}$

$X_{C} =3*V^2/Q_{C}$

$X_{C} =3*(480)^2/14*10^3$ Ω

(e) Compute the magnitude of the current in each capacitor and the line current from the source.

Current flowing in the capacitor is

$I_{cap} =V/X_{C} =480/49.37=9.72 A$

Line current flowing from the source is

$I_{line} =P_{C} /3*V=23*10^3/3*480=27.66 A$

8 0

3 years ago

Dos capacitores de placas paralelas, idénticos, pero con la excepción de que uno tiene el doble de separación entre sus placas q

Charra [1.4K]

Las características de la capacitancia permiten encontrar los resultados para las diferentes preguntas

1) El capacitor con menor distancia entre las placas tiene mayor campo eléctrico.

2) El capacitor con menor distancia tiene mayor carga

3) El capacitor con menor distancia tiene mayor densidad de carga

Los capacitores son sistema que sirve para acumular carga, esa formado por placas conductoras separadas una distancia pequeña, la capacitancia es

$C = \frac{Q}{DV} = \frac{\epsilon_o A}{d}$

Donde Q es a carga, ΔV la diferencia de potencial, A el area y d la separación de las placas.

Busquemos las respuestas para las diferentes preguntas:

1) Cual tiene mayor campo eléctrico.

El potencial y el campo eléctrico están relacionados

ΔV = - E d

E = - $\frac{\Delta V}{d}$

Indican que un capacitor tiene el doble de separación de las placas que el otro

Capacitor 1

E = $- \frac{\Delta V}{d_1}$

Capacitor 2

d₂ = 2 d₁

E₂ = $- \frac{\Delta V}{2d_1}$

E₂= ½ E₁

Por lo tanto el capacitor con menor distancia entre las placas tiene mayor campo eléctrico.

2) Cual tiene mas carga

Busquemos la carga para cada capacitor

Q = ε₀ $\frac{A \Delta V}{d}$

Capacitor 1

Q₁ = (ε₀ A ΔV) $\frac{1}{d_1}$

Capacitor 2

Q₂ = (ε₀ A Δv) $\frac{1}{2d_1}$

Q₂ = Q₁/2

El capacitor con menor distancia tiene mayor carga

3) Cual tiene mayor densidad de energía

La densidad de energía en un capacitor esta dada por

$u_E$ = ½ ε₀ E²

calculamos para cada capacitor

Capacitor 1

$u_{E\ 1}$ = ½ ε₀ E₁²

Capacitor 2

$u_{E 2}$ = ½ ε₀ (E₁/2)²

por lo cual el capacitor con menor distancia tiene mas densidad de carga

En conclusión con lass característica de capacitancia podemos encontrar los resultados para las diferentes preguntas

1) El capacitor con menor distancia entre las placas tiene mayor campo eléctrico.

2) El capacitor con menor distancia tiene mayor carga

3) El capacitor con menor distancia tiene mas densidad de carga

Aprender mas aquí: brainly.com/question/22813371

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3 years ago

How can you evaluate whether the slope of the dependent variable with an independent variable is the same for each level of the

s2008m [1.1K]

Answer:

By running multiple regression with dummy variables

Explanation:

A dummy variable is a variable that takes on the value 1 or 0. Dummy variables are also called binary

variables. Multiple regression expresses a dependent, or response, variable as a linear

function of two or more independent variables. The slope is the change in the response variable. Therefore, we have to run a multiple regression analysis when the variables are measured in the same measurement.The number of dummy variables you will need to capture a categorical variable

will be one less than the number of categories. When there is no obvious order to the categories or when there are three or more categories and differences between them are not all assumed to be equal, such variables need to be coded as dummy variables for inclusion into a regression model.

3 0

3 years ago