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4 years ago

SEICUL UC CULTELL allsvel.

Engineering

2 answers:

Ratling [72]4 years ago

7 0

C because to covert energy you need a generator

cestrela7 [59]4 years ago

3 0

Answer:

E. motors

Explanation:

Motors convert electrical energy into mechanical energy.

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Degreasers can be broken down into two main categories

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Degreasers can be categorized to be either water-based or solvent-based.

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3 years ago

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Linear Time Invariant Systems For each of the systems below an input x(t) and the output y(t) are plotted. Determine whether eac

STALIN [3.7K]

Answer:

The system can be described by a convolution

Explanation:

Thinking process:

If we consider a discrete input to a linear time-invariant system, then the system will be periodic with respect to the period, say N. This therefore, means that the output must also be periodic. The proof is as follows:

The LTI system can be written for the system where:

y (n+N) = ∑ $h(k)x(n + N - k)$

= ∑ $h(k)x(n-k)\\= y(n)$

From the proof, it turns out that y(y + N) = y(n) for any value of n, then the output will be the periodic with the period N.

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3 years ago

Refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -16oC and a quality of 20% at a ve

Dmitry [639]

Answer:

mass flow rate = 0.0534 kg/sec

velocity at exit = 29.34 m/sec

Explanation:

From the information given:

Inlet:

Temperature $T_1 = -16^0\ C$

Quality $x_1 = 0.2$

Outlet:

Temperature $T_2 = -16^0 C$

Quality $x_2 = 1$

The following data were obtained at saturation properties of R134a at the temperature of -16° C

$v_f= 0.7428 \times 10^{-3} \ m^3/kg \\ \\ v_g = 0.1247 \ m^3 /kg$

$v_1 = v_f + x_1 ( vg - ( v_f)) \\ \\ v_1 = 0.7428 \times 10^{-3} + 0.2 (0.1247 -(0.7428 \times 10^{-3})) \\ \\ v_1 = 0.0255 \ m^3/kg \\ \\ \\ v_2 = v_g = 0.1247 \ m^3/kg$

$m = \rho_1A_1v_1 = \rho_2A_2v_2 \\ \\ m = \dfrac{1}{0.0255} \times \dfrac{\pi}{4}\times (1.7 \times 10^{-2})^2\times 6 \\ \\ \mathbf{m = 0.0534 \ kg/sec}$

$\rho_1A_1v_1 = \rho_2A_2v_2 \\ \\ A_1 =A_2 \\ \\ \rho_1v_1 = \rho_2v_2 \\ \\ \implies \dfrac{1}{0.0255} \times6 = \dfrac{1}{0.1247}\times (v_2)\\ \\ \\\mathbf{\\ v_2 = 29.34 \ m/sec}$

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3 years ago

How will we achieve our goal

DanielleElmas [232]

Answer:

Take action. Try hard. Keep practicing. Explore a different way. Ask someone how to do it better. Do your best. Learn how others have done it. Build upon your strengths. Review and fix any mistakes. Don’t give up.

Hope this helped you!

Explanation:

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4 years ago

Think about all the things that you have learned about wildfire in this module.

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Answer:

CLIMATE CHANGE HAS inexorably stacked the deck in favor of bigger and more intense fires across the American West over the past few decades, science has incontrovertibly shown. Increasing heat, changing rain and snow patterns, shifts in plant communities, and other climate-related changes have vastly increased the likelihood that fires will start more often and burn more intensely and widely than they have in the past.

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