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Brums [2.3K]
3 years ago
11

The clothes washer in your house consumes 470 kWh of energy per year. Price of the washer is $360 and the lifetime of the washer

is 10 yrs. Energy price in your city is 9 cents per kWh. What is the lifecycle cost of the clothes washer?
Physics
1 answer:
VashaNatasha [74]3 years ago
7 0

Answer:

$893

Explanation: the complete question should be

The clothes washer in your house consumes 470 kWh of energy per year. Price of the washer is $360 and the lifetime of the washer is 10 yrs. Energy price in your city is 9 cents per kWh. What is the lifecycle cost of the clothes washer? (assume a maintenance cost of $11 per year)

SOLUTION

Given:

The clothes washe power consumption (PC) is 470 kWh

Price of the washer (P) is $360

lifetime of the washer (L) is 10 yrs

Energy price in the city (E) is 9 cents per kWh (Covert to $ by dividing 100)

maintenance cost (M) is $11 per year

Lifecycle cost = P + (PC × L × E) +M + L

Lifecycle cost = $360 + (470kWh × 10years × 9cents/100) + ($11 × 10years)

=$893

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Answer:

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A)

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        a_{c} =\frac{v^{2}}{r} = \frac{(10.0m/s)^{2}}{r} = 5.00 m/s2  (1)

  • Solving for r:

       r = \frac{v^{2}}{a_{c} } = \frac{(10.0m/s)^{2}}{5.00m/s2} = 20.0 m  (2)

B)

  • We can apply the definition of linear velocity, remembering that the period is the time needed to complete an entire circle (T).
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        v = \frac{\Delta s}{\Delta t} = \frac{2*\pi*r}{T} (3)

  • Solving  for T:

       T = \frac{\Delta s}{v} = \frac{2*\pi*r}{v} = \frac{2*\pi*265m}{40.0m/s} =41.6 s  (4)

C)

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