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3 years ago

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Physics

1 answer:

ZanzabumX [31]3 years ago

4 0

Answer: mass x height x gravitational field strength (g)

note: gravitational field strength (g) = 10 N/Kg

55 x 15 x 10 = 8250

gpe = 8250j

Explanation:

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The luxury liner Queen Elizabeth 2 has a diesel-electric powerplant with a maximum power of 84 MW at a cruising speed of 35.0 kn

frosja888 [35]

Answer:

$F = 4669.201\,kN$

Explanation:

Maximum speed is get at maximum power. Let assume that ship travels at constant speed, the expression for power is equal to:

$\dot W = F\cdot v$

Where $F$ and $v$ are the forward force and speed of ship measured in newtons and meters per second, respectively.

The forward force can be determined by clearing it in the expression described above:

$F = \frac{\dot W}{v}$

$F = \frac{84\times 10^{3}\,kW}{(35\,knots)\cdot \left(\frac{0.514\,\frac{m}{s} }{1\,knot} \right)}$

$F = 4669.201\,kN$

4 0

3 years ago

Read 2 more answers

A wire is stretched between two posts. Another wire is stretched between two posts that are four times as far apart. The tension

Elena-2011 [213]

Answer:

Therefore,

The speed of the wave on the longer wire is 95 m/s.

Explanation:

Given:

For Short wire, speed is

$v_{s}=190\ m/s$

Let length of Short and Longer wire be $L_{s}\ and\ L_{l}$ such that

$L_{l}=4\times L_{s}$

To Find:

$v_{l}=?$ Speed on the longer wire

Solution:

The speed of a pulse or wave on a string under tension can be found with the equation,

$v=\sqrt{\dfrac{F_{T}\times L}{m}$

Where,

$F_{T}$ = Tension on the wire

L = Length of Sting

m = mass of String

So here we have,

$F_{T}$ = same

$L_{l}=4\times L_{s}$

Therefore,

$v_{s}=\sqrt{\dfrac{F_{T}\times L_{s}}{m}$ ......equation ( 1 )

And

$v_{l}=\sqrt{\dfrac{F_{T}\times L_{l}}{m}$ .......equation ( 2 )

Dividing equation 1 by equation 2 and on Solving we get

$\dfrac{v_{s}}{v_{l}}=\sqrt{\dfrac{L_{s}}{L_{l}}}$

Therefore,

$v_{l}=v_{s}\sqrt{\dfrac{4\times L_{s}}{L_{s}}}=190\times 2=380\ m/s$

Therefore,

The speed of the wave on the longer wire is 95 m/s.

8 0

4 years ago

A Boulder drops in the water and creates a wave with a period of 2s/cycle and a wavelength of .75 m/cycle. How fast is the wave

laiz [17]

Answer:

v = 0.375 m/s

Explanation:

Given that,

The wavelength of a wave is 0.75 m/cycle

The period of a wave is 2s/cycle

We need to find the speed of the wave. We know that,

$v=\dfrac{d}{t}$

Substitute all the values,

$v=\dfrac{0.75}{2}\\\\v=0.375\ m/s$

So, the speed of the wave is equal to 0.375 m/s.

7 0

3 years ago

5. To increase this characteristic of contentment in my life, I need to...

Anon25 [30]

Answer:

Love yourself, that's what you need to do. In order to be content, let yourself! Treat you right.

4 0

3 years ago

what is the mechanical advantage of a machine that uses an input force of 20 newtons to achieve an output force of 60 newtons

inn [45]

The answer to your question will be 3.

4 0

3 years ago