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3 years ago

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Engineering

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An isolation transformer whose main purpose is to reduce voltage spikes will have a turns ratio of?

garik1379 [7]

Answer:

An isolation transformer whose main purpose is to reduce voltage spikes will have a turns ratio of 1 to 1.

This is due to the windings input and output having the same waveform and amplitude.

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2 years ago

Air at 7 deg Celcius enters a turbojet engine at a rate of 16 kg/s and at a velocity of 300 m/s (relative to engine). Air is hea

Savatey [412]

To solve this problem we will start using the given temperature values and then transform them to the Kelvin scale. From there through the properties of the tables, described for the Air, we will find the entropy. With these three data we can perform energy balance and find the speed of the fluid at the exit, which will finally help us find the total force:

$V_i = 300m/s$

$T_1 = 7\°C = 280K$

$T_2 = 427\°C = 700K$

$\dot{m} 16kg/s$

$\dot{Q}_{in} = 15000kJ/s$

Using the tables for gas properties of air we can find the enthalpy in this two states, then

$T_1 = 280K \rightarrow h_1 = 280.13kJ/Kg\cdot K$

$T_2 = 700K \rightarrow h_2 = 713.27kJ/Kg\cdot K$

Applying energy equation to the entire engine we have that

$\frac{\dot{Q}_{in}}{\dot{m}}+h_1 +\frac{1}{2} V^2_{in} = h_2 + \frac{1}{2} V^2_{out}$

$\frac{15000}{16}*10^3+280.13*10^3+\frac{1}{2} 300^2 = 713.27*10^3+\frac{1}{2} V^2_{out}$

$V_{out} = 1048.198m/s$

Finally the force in terms of mass flow and velocity is

$F = \dot{m} (V_{out}-V_{in})$

$F = 16(1048.198-300)$

$F= 11971.168N$

Therefore the thrust produced by this turbojet engine is 11971.168N

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3 years ago

Hãy xác định điện áp ngõ ra Về và các dòng điện chạy

Vitek1552 [10]

Answer:

furi has a good reputation for any other business in a few hours of this period of time as per it and the company is not a good place to start and it will have a lot of experience and you have to make a good recovery and you can do something that you can get a lot to be able and you have a lot to

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3 years ago

What do you mean by overflow and underflow error in array?.

Misha Larkins [42]

Answer:

Overflow and underflow are both errors resulting from a shortage of space. On the most basic level, they manifest in data types like integers and floating points. Unlike the physical world, the number stored in a computer exists in a discrete number of digits.

Explanation:

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3 years ago

Basic concepts surrounding electrical circuitry?

Elanso [62]

Hopefully that helps you out and is this for history or science?

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3 years ago