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3 years ago

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A worker does 500 J of work on a 10 kg box.If the box transfers 375 J of heat to the floor through the friction between the box

and the floor,what is the velocity of the box after the work has been done on it?

1 answer:

kipiarov [429]3 years ago

3 0

The answer is in attachment

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A 1.0 kg object moving at 4.5 m/s has a wavelength of:

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By wave particle duality.

Wavelength , λ = h / mv

where h = Planck's constant = 6.63 * 10⁻³⁴ Js, m = mass in kg, v = velocity in m/s.
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λ = h / mv

λ = (6.63 * 10⁻³⁴) /(1*4.5)

λ ≈ 1.473 * 10⁻³⁴ m

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How to calculate wavelength in m when you know the frequency?

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Answer:

$\large \boxed{\mathrm{C. \ \ \frac{500}{7 \times 15 \times 8} \ g/cm^3 }}$

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$\displaystyle \sf Density = \frac{mass}{volume}$

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2 years ago

(8 points) Air is used as the working fluid in a simple ideal Brayton cycle that has a pressure ratio of 12, a compressor inlet

trapecia [35]

Answer:

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$\frac{T_3}{T_4'} = rp ^{\frac{\gamma -1}{\gamma}}$

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$T_4' = 491.66 K$

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w = 1.005(610.18 - 300)

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w(turbine) = 510.88 kJ/kg

a) mass flow rate for isentropic process is given as

$\dot m = \frac{70000}{510.88 - 311.73}$

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2 years ago

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Answer:

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2 years ago