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2 years ago

14

A machine has an efficiency of 60%. If the machine is required to overcome a load of 30N with a force of 20N, calculate its mech

anical advantage?

1 answer:

skelet666 [1.2K]2 years ago

5 0

Explanation:

eff = m.a/ v.r

m.a = L /E

30/ 20

= 1. 5

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If only 10 pounds is required to lift a 500-lb block, how much chain must be played out to lift the engine 3.0 inches?

adelina 88 [10]

Answer:

150 inches (12.5 ft)

Explanation:

The work done to lift the 500 pound block 3 inches should be the same as that to lift the 10 pond object a given distance.

The following is the equation one needs to solve:

$10 \,lb\,* \,x\,=\,500\,lb\,*\,3\,in\\10 \,lb\,* \,x\,=\,1500\,lb\,in\\$

therefore solving for the distance "x" gives as the answer (in inches):

$10 \,lb\,* \,x\,=\,1500\,lb\,in\\x\,=\,\frac{1500\,lb\,in}{10\,lb} \\\\x\,=150\,in$

which can also be given in feet as: 12.5 ft

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3 years ago

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Given: Wavelength λ = 410 nm convert to Meters m = 4.10 x 10⁻⁷ m

Speed of light c = 3 x 10⁸ m/s

Required: Frequency f = ?

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f = 7.32 x 10¹⁴/s or 732 Thz (Terahertz)

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3 years ago

2. Chickens that are large, castrated males

vagabundo [1.1K]

Answer:

A capon (from Latin: caponem) is a cockerel (rooster) that has been castrated or neutered, either physically or chemically, to improve the quality of its flesh for food, and, in some countries like Spain, fattened by forced feeding.

Explanation:

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MA_775_DIABLO [31]

Answer:

$v_B=3.78\times 10^5\ m/s$

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Potential at point A, $V_A=1.5\times 10^3\ V$

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increase in kinetic energy = increase in potential×charge

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I'm pretty sure its a scale.

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