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3 years ago

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Which phrase best describes a safety-critical system? A. a system that faces a very high risk of failure B. a system isolated fr

om others in an industrial unit because of a safety risk C. a system with automatic controls to shut it down if a malfunction occurs D. a system whose malfunction or failure can harm human life

1 answer:

KIM [24]3 years ago

7 0

Answer:

B.

Explanation:

A safety-critical system (SCS) or life-critical system is a system whose failure or malfunction may result in one (or more) of the following outcomes: death or serious injury to people. loss or severe damage to equipment/property.

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Does anybody know what plane this is? i saw it the other day doing a low pass through my community

Arlecino [84]

Answer:

Airbus A340-313

Explanation:

it is what it is

3 0

2 years ago

What is the voltage output (in V) of a transformer used for rechargeable flashlight batteries, if its primary has 515 turns, its

kow [346]

<h2>Answer:</h2>

7532V

<h2>Explanation:</h2>

For a given transformer, the ratio of the number of turns in its primary coil ( $N_{p}$ ) to the number of turns in its secondary coil ( $N_{s}$ ) is equal to the ratio of the input voltage ( $V_{p}$ ) to the output voltage ( $V_{s}$ ) of the transformer. i.e

$\frac{N_p}{N_s}$ = $\frac{V_p}{V_s}$ ----------------(i)

<em>From the question;</em>

$N_{p}$ = number of turns in the primary coil = 8 turns

$N_{s}$ = number of turns in the secondary coil = 515 turns

$V_{p}$ = input voltage = 117V

<em>Substitute these values into equation (i) as follows;</em>

$\frac{8}{515}$ = $\frac{117}{V_s}$

<em>Solve for </em> $V_{s}$ <em>;</em>

$V_{s}$ = 117 x 515 / 8

$V_{s}$ = 7532V

Therefore, the output voltage (in V) of the transformer is 7532

6 0

3 years ago

The weatherman states that the current temperature is 95 F and the dew point is 74 F. What is the current relative humidity?

spayn [35]

Answer:

Current Relative Humidity is 29.623

Given:

Current Temperature, $T_{c} = 95 F = 35^{\circ}C$

Dew point temperature, $T_{d} = 74 F = 23.34^{\circ}C$

Solution:

Now, in order to calculate the Relative Humidity, RH, we use the given formula:

$T_{d} =100( \frac{\frac{aT_{c}}{b + T}b + lnRH}{a - \frac{aT_{c}}{b + T} + lnRH})$

where

a = 17.625

b = 237.7

Now, using the above formula and given values:

$23.34 = (237.7\frac{\frac{17.625\times 35}{ 237.7 + 35} + lnRH}{17.625 - \frac{17.625\times 35}{237.7 + 35} + lnRH})$

$23.34(17.625 - 2.26 + lnRH) = (237.7\times 2.26 + lnRH)$

$358.62 + 23.34lnRH) = (537.20 + lnRH)$

$358.62 + 23.34lnRH) = (537.20 + lnRH)$

On solving the above eqn, we get:

RH = 29.623

3 0

3 years ago

A 3-phase induction motor with 4 poles is connected to a voltage source with an amplitude of 209 Vrms and a frequency of 120 Hz.

Ket [755]

Answer:

<em>T = 25.41 Nm</em>

Explanation:

Calculating Nsync (Synchronous Speed):

$Nsync = 120f/P$

$Nsync = 120 x 120 / 4\\Nsync = 3600 rpm$

$Wsync = 3600 * 2\pi /180\\Wsync = 377 rad/s$

Calculating s (Slip):

$s = (Nsync - Nm) / Nsync \\[tex]s = (3600-2464)/3600\\s = 0.3156$

Calculating Vth (Thevenin Voltage):

$Vth = Vph (Xm / \sqrt{Rs^{2} + (Xs+Xm)^{2} })\\Vth = 209 (76 / \sqrt{(2.3)^{2} + (1.3 + 76)^{2} }\\Vth = 205.39 V$

Calculating Rth (Thevenin Resistance):

$Rth = Rs (Xm/Xs + Xm)^{2} \\Rth = 2.3 (76/1.3 + 76)^{2} \\Rth = 2.22 ohm$

Calculating Xth (Thevenin Reactance):

Xth = Xs = 1.3 ohm

Calculating Torque:

$T = (3Vth^{2}Rr/s) / (Wsync[(Rth+Rr/s)^{2} + (Xth + Xr)^{2}])\\T = (3*205.39*0.7/0.3156) / 377[(2.22+0.7/0.315)^{2} + (1.3+1.8)^{2}]$

T = 280699 / 377 [19.69 + 9.61]

<em>T = 25.41 Nm</em>

4 0

3 years ago

Sphinxa [80]

Answer:

yo do you still need an

answer

Explanation:

6 0

3 years ago