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Semmy [17]
3 years ago
15

Why is sitting correctly important

Engineering
2 answers:
icang [17]3 years ago
8 0

Answer:

It defines posture

Explanation:

sitting correctly defines how you spine will relax into a bend. If you sit straight, your spine will be straight allowing your older years the ease of not having a hunch on your back. This will allow you to more properly walk and stand as you age. It will also help prevent back pain in high school years as well as college years.

castortr0y [4]3 years ago
5 0

Answer: It helps your back posture and shows respect

Explanation:

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s 0Miles (short), 150 Miles(medium), and 300 Miles (long).

Explanation:

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Two sites are being considered for wind power generation. On the first site, the wind blows steadily at 7 m/s for 3000 hours per
kirill [66]

Solution :

Given :

$V_1 = 7 \ m/s$

Operation time, $T_1$ = 3000 hours per year

$V_2 = 10 \ m/s$

Operation time, $T_2$ = 2000 hours per year

The density, ρ = $1.25 \ kg/m^3$

The wind blows steadily. So, the K.E. = $(0.5 \dot{m} V^2)$

                                                             $= \dot{m} \times 0.5 V^2$

The power generation is the time rate of the kinetic energy which can be calculated as follows:

Power = $\Delta \ \dot{K.E.} = \dot{m} \frac{V^2}{2}$

Regarding that $\dot m \propto V$. Then,

Power $ \propto V^3$ → Power = constant x $V^3$

Since, $\rho_a$ is constant for both the sites and the area is the same as same winf turbine is used.

For the first site,

Power, $P_1= \text{const.} \times V_1^3$

            $P_1 = \text{const.} \times 343 \ W$

For the second site,

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5 0
3 years ago
A car has a steering wheel with a 15 inch diameter that takes 18 lbs of Effort force to move is
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3 years ago
To increase the thermal efficiency of a reversible power cycle operating between thermal reservoirs at TH and Tc, would you incr
alukav5142 [94]

<u></u>\ T_{c} has greater effect.

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when T_{c} is decreased by 't',

$\eta_{\text {incre }}$ = 1-\frac{\left(\tau_{c}-t\right)}{T_{H}}

=n \ + \frac{t}{T_{n}}      -(i)

when {T_{H}} is increased by 'T'

\eta_{i n c}=\frac{n+\frac{t}{T_{H}}}{\left(1+\frac{k}{T_{H}}\right)}-(ii)

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I attached a photo that explains and gives the answer to your questions. Had to add a border because the whole picture didn’t fit.

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