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3 years ago

If someone told you that a certain AC circuit was a capacitive, you would know that in that circuit the current

Engineering

1 answer:

Drupady [299]3 years ago

6 0

Answer:

B) leads the voltage

Explanation:

One way to think about it is that the current causes charge to be accumulated on the capacitor, changing its voltage. The current must be non-zero before the voltage can change. Hence current leads voltage.

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Consider a 18-mm by 18-mm chip that is cooled on its top surface by a 6 m/s flow of 25 ºC air. Any heat transfer from its bottom

vladimir2022 [97]

Find the below attachments

7 0

4 years ago

Read 2 more answers

Air enters a compressor at 100 kPa and 25 ⁰C. It is compressed to 2 MPa and exits the compressor at 540 K. The compressor is at

AysviL [449]

Answer:

(a) The reversible work is 207 kJ/kg

(b) The irreversibility rate is -38.39 kJ/kg

Explanation:

State1 : p1 = 100kpa, T1= 25+273 =298k

From air table, h1 =298.18 kJ/kg, s10= 1.69528 kJ/kgK

State 2a:p2=2mpa,t2=540k (actual condition 2a)

h2a= 544.35 kJ/kg,s2a0=2.29906

actual work input to the compressor =wout=h1-h2+Qin

=298.18-544.35+(-150)kJ/kg(- sign indicate heat loss)

=(-246.17)kJ/kg(-ve sign indicates the work is given into the system

a) Reversible work= Win actual - any irreversiblities present

=246.17 + irreversibilty

b) irreversibility = T0(Entopy generation Sgen) for air, Sgen

=s20-s10-Rln(p2/p1), T0=250C

=(25+273)(s2a0-s10-Rlnp2/p1+Qout/Tsurr)

= 298x[(2.29906-1.69528-0.287kJ/kgK xln(2000kpa/100) + 150 /298]

= -38.39 kJ/kg

a)Reversible work = Win actual -any irreversiblities present

=246.17 + irreversibilty

=246.17+-38.39

=207 kJ/kg

8 0

3 years ago

A programmer needs to understand sequencing to determine whether the order of steps will affect the outcome of the program.

Ivahew [28]

I would say true as a programmer must know the sequence to understand the steps and they must also know the outcome of the program(that’s the reason they are programming)

7 0

3 years ago

Read 2 more answers

What is Applied Science?

andreev551 [17]

Answer:

Applied science is the application of existing scientific knowledge to practical applications, like technology or inventions. Within natural science, disciplines that are basic science develop basic information to predict and perhaps explain and understand phenomena in the natural world.

6 0

3 years ago

1. If a Series circuit has two loads of 8 and 4, what do you know about their voltage drops?

mixas84 [53]

Answer:

the voltage drops will have the ratio 2 : 1

Explanation:

Assuming the loads have the same power factor, the voltage drop will be proportional to the load impedance. The loads have a ratio of 8 : 4 = 2 : 1, so the voltage drops will have a ratio of 2 : 1.

We assume the number associated with the load is representative of its impedance (not admittance, or some other measure).

8 0

3 years ago