Question

In: Physics

Estimate the cost of routine use of a 2.50 kW handheld hair dryer for 1 year (52 weeks)

Estimate the cost of routine use of a 2.50 kW handheld hair dryer for 1 year (52 weeks). Assume that a person uses the hair dryer on average for 18 minutes each day, 4 times per week.

Solutions

Expert Solution

A person uses the hair dryer for 18 min (0.30 h) at a time, 4 times a week on average. That means that in 52 weeks he/she uses it an average of 208 times.

Step 1 

Given data:

\( P = \rm 2.50\,kW \\ \)

\( N = 4\times 52 = 208\ \text{times per year}\ \)

\( t = \rm 0.30\,h \times 208 = 62.4\,h \ \)

 Step 2

\( {\rm Energy} = P\times t = \rm (2.50\,kW)(62.4\,h) = 156\,kWh \ \) 

 Step 3

If we assume that the cost of electricity is about $0.150 per kWh, then the estimated cost (C) of the electricity consumed by the hair dryer for one year is

\( C = \rm {\rm Energy}( $ 0.150/ kWh) = (156\, kWh)( $0.150/ kWh) = \boxed{ $23.4} \)

 

 


The annual cost of using a hair dryer is about $23.4.

Related Solutions

for a firm that assumes 52 weeks a year, every 6 years there will be extra...
for a firm that assumes 52 weeks a year, every 6 years there will be extra days that accumulates 53 weeks in a year. which one of the following financial statement does this uneven number of week in a year affect the least a. balmace sheet b. income statement c. other compreohensive imcome statement
Problem 1:    An ophthalmologist’s office operates 52 weeks per year. It purchases disposable contact lenses...
Problem 1:    An ophthalmologist’s office operates 52 weeks per year. It purchases disposable contact lenses for $11.70 per pair. The following information is available about these lenses. Demand = 90 pairs/week Order cost = $54/order Annual holding cost = 27% of purchasing cost Desired cycle-service level = 80% Lead time = 3 weeks Standard deviation of weekly demand = 15 pairs Current on-hand inventory is 320 pairs, with no open orders or backorders. Part I   Currently, the company uses...
1: A museum of natural history opened a gifl shop which operates 52 weeks per year....
1: A museum of natural history opened a gifl shop which operates 52 weeks per year. managing invertories has become a problem.Top-selling SKU is a bird feeder. sale are 18 uits per week, the supplier charges $60 per unit. Ordering cost is $45. annual holding cost 25 percernt of a feeder's value. management chose a 390-unit lot size what is the annual cycle-inventory cost of the current policy of using a 390-unit lot size? would a lot size of 468...
Births are approximately Uniformly distributed between the 52 weeks of the year. They can be said...
Births are approximately Uniformly distributed between the 52 weeks of the year. They can be said to follow a Uniform distribution from 1 to 53 (a spread of 52 weeks). Round answers to 4 decimal places when possible. The mean of this distribution is The standard deviation is The probability that a person will be born at the exact moment that week 52 begins is P(x = 52) = The probability that a person will be born between weeks 20...
Construction labor is budgeted on the basis of 52 weeks per year. Construction labor is budgeted...
Construction labor is budgeted on the basis of 52 weeks per year. Construction labor is budgeted on the basis of 40 hours per work week (Assuming overtime premiums) A contractor employs his labor force for the full year of 1,676 hours with a company policy that recognizes the following: 5 paid holidays per year.- 103 hours of paid leave per year, per employee. For estimating purposes what are standard costs/hours for how many work hours are available for productive work...
1.A client makes a routine visit to the prenatal clinic. Although she is 14 weeks pregnant,...
1.A client makes a routine visit to the prenatal clinic. Although she is 14 weeks pregnant, the size of her uterus approximates that in an 18- to 20-week pregnancy. Dr. Durante diagnoses ectopic pregnancy and orders ultrasonography. The midwife expects ultrasonography to reveal: A. an empty gestational sac. B. grapelike clusters. C. a severely malformed fetus. D. an extrauterine pregnancy. 2.In which of the following types of spontaneous abortions would the midwife assess absence of cervical dilatation and spot bleeding?...
Juan Rodriquez, a 52-year-old male, had a routine screening colonoscopy last week. He was asked to...
Juan Rodriquez, a 52-year-old male, had a routine screening colonoscopy last week. He was asked to come into the office for the results this morning. Mr. Rodriquez was diagnosed with colon cancer and is scheduled for surgery to remove the tumor in 2 days. What psychosocial concerns should the nurse anticipate in caring for Mr. Rodriquez and his family? Mr. Rodriquez has the surgery and is recovering without complications. His oncologist has discussed radiation therapy with Mr. Rodriquez and his...
Sam's Cat Hotel operates 52 weeks per year, 7 days per week
Sam's Cat Hotel operates 52 weeks per year, 7 days per week, and uses a continuous review inventory system. It purchases kitty litter for $10.75 per bag. The following information is available about these bags. Refer to the standard normal table for z-values. >Demand 95 bags/week >Order cost $56/order >Annual holding cost = 30 percent of cost >Desired cycle-service level = 99 percent >Lead time = 4 week(s) (28 working days) >Standard deviation of weekly demand = 20 bags >Current on-hand inventory is 325 bags, with no...
A person can choose to work any amount from 0 to 52 weeks per year at...
A person can choose to work any amount from 0 to 52 weeks per year at a wage of $1000 per week. (12 points) For each of the scenarios below, indicate whether the proposed change will increase or decrease the number of weeks that this person will work, or if the effect is uncertain. Justify your answer by stating whether the change in the budget constraint leads to an income effect, a substitution effect, or both, and draw the new...
Your firm uses a continuous review system and operates 52 weeks per year. One of the...
Your firm uses a continuous review system and operates 52 weeks per year. One of the SKUs has the following characteristics. Demand (D) = 20,000 units/year Ordering cost (S) = $40/order Holding cost (H) = $2/unit/year Lead time (L) = 2 weeks Cycle-service level = 95 percent Demand is normally distributed, with a standard deviation of weekly demand of 100 units. Current on-hand inventory is 1,040 units, with no scheduled receipts and no backorders. a. Calculate the item’s EOQ. What...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT