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1 year ago

6

The temperature of a heat engine is 500k some of the heat generated by the engine flows to the surroundings which are at a temp

of 125k

1 answer:

Ierofanga [76]1 year ago

3 0

1-125/500)x100=efficiency

1-1/4)x100 =75pc

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Which of the following quantities provide enough information to calculate the tension in a string of mass per unit length μ that

Bad White [126]

Answer:

A. the wave speed v and Wavelength

Explanation:

Given that

Mass density per unit length=μ

Frequency = f

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$\mu=\dfrac{T}{V^2}\ kg/m$

$V=\sqrt{\dfrac{T}{\mu}}$

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V=Velocity

V= f λ

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Therefore to find the tension ,only wavelength and speed is required.

The answer is A.

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2 years ago

A uniform 40-N board supports two children weighing 500 N and 350 N. If the support is at the center of the board and the 500-N

serg [7]

Answer:

b= 2.14 m

Explanation:

Given that

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Now by taking the moment about the center of the board

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500 x 1.5 = 350 x b

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Therefore the distance of the 350 N weight child from the center is 2.14 m.

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1 year ago

Cassidy Carver's family child care center has an activities table with four chairs an easel that can accommodate a child on each

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Answer:4

Explanation:

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2 years ago

You have a resistor and a capacitor of unknown values. First, you charge the capacitor and discharge it through the resistor. By

Fittoniya [83]

Answer:

The frequency is $f = 0.221 \ Hz$

Explanation:

From the question we are told that

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Let the voltage of the capacitor when it is fully charged be $V_o$

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substituting values

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$- \frac{0.5}{RC} = ln (0.5)$

$-\frac{0.5}{RC} = -0.6931$

$RC = 0.721$

Generally the cross-over frequency for a low pass filter is mathematically represented as

$f = \frac{1}{2 \pi * RC }$

substituting values

$f = \frac{1}{2* 3.142 * 0.72 }$

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2 years ago

Which amplitude of the following longitudinal waves has the greatest energy?

Rashid [163]

Which amplitude of the following longitudinal waves has the greatest energy?

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2 years ago

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