Question

An electronic variable-speed- controlled fan operates at 1200 RPM.   How much is its acoustical power (in...

An electronic variable-speed- controlled fan operates at 1200 RPM.   How much is its acoustical power (in decibel) reduced if

The fan speed is reduced by 20%. (5 points)

The fan speed is reduced by 50% (5 points)

Engineering   Mechanical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
3. How much mass (in kilograms) radioactive material is need to power Earth’s interior over its...
3. How much mass (in kilograms) radioactive material is need to power Earth’s interior over its lifetime? What fraction of Earth's mass is this? The flow of heat from Earth's interior to the surface is estimated to be 50 terawatt (1 terawatt = 1 e12 joule/sec) and comes from two main sources in roughly equal amounts: th energy produced by the radioactive decay of isotopes, and the energy left over from the formation of the Earth. All numbers must be...
1. A 25 kg skydiver has a speed of 20 m/s at an altitude of 350...
1. A 25 kg skydiver has a speed of 20 m/s at an altitude of 350 m above the ground. Determine the kinetic energy possessed by the skydiver. 2. If a cruise ship travels 150 km to the south and then 250 km to the west, what is the ship’s displacement from its starting point? 3. A train is accelerating at a rate of 5 m/s . If its initial velocity is 15 m/s, what is its speed after 10...
How does the fuel consumption of a car change as its speed increases? Here are data...
How does the fuel consumption of a car change as its speed increases? Here are data for a British Ford Escort. Speed is measured in kilometers per hour, and fuel consumption is measured in liters of gasoline used per 100 kilometers traveled. Speed Fuel 10 21.00 20 13.00 30 10.00 40 8.00 50 7.00 60 5.90 70 6.30 80 6.95 Speed Fuel 90 7.57 100 8.27 110 9.03 120 9.87 130 10.79 140 11.77 150 12.83 (a) Make a scatterplot....
QUESTION 1 Which refers to development governed by automatic, genetically predetermined signals? Elaboration Natural progression Maturation...
QUESTION 1 Which refers to development governed by automatic, genetically predetermined signals? Elaboration Natural progression Maturation Tabula rasa 0.5 points    QUESTION 2 _____ research studies several groups of individuals at various ages, at one point in time, and provides information regarding _____. Longitudinal; age differences Cross-sectional; age differences Longitudinal; age changes Cross-sectional; age changes 0.5 points    QUESTION 3 Differences in age groups that reflect factors unique to a specific age group, rather than being due to developmental changes,...
MATHEMATICS 1. The measure of location which is the most likely to be influenced by extreme...
MATHEMATICS 1. The measure of location which is the most likely to be influenced by extreme values in the data set is the a. range b. median c. mode d. mean 2. If two events are independent, then a. they must be mutually exclusive b. the sum of their probabilities must be equal to one c. their intersection must be zero d. None of these alternatives is correct. any value between 0 to 1 3. Two events, A and B,...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary rivals? How will the acquisition of Reebok by Adidas impact the structure of the athletic shoe industry? Is this likely to be favorable or unfavorable for New Balance? 2- What issues does New Balance management need to address? 3-What recommendations would you make to New Balance Management? What does New Balance need to do to continue to be successful? Should management continue to invest...
How can differential analysis be applied here to determine if it would be profitable to invest...
How can differential analysis be applied here to determine if it would be profitable to invest in new equipment to increase capacity for a constrained resource? KRAYDEN’S CYCLE COMPONENTS INTRODUCTION: COMPANY, PRODUCT, AND SUPPLY CHAIN Krayden’s Cycle Components (KCC) is a high-end specialty fabricator that manufactures one product with many variants. The basic product is known as a rolling chassis, a key component used in manufacturing motorcycles. While there are variations across the industry, a rolling chassis typically consists of...
Assume that consumers view tax preparation services as undifferentiated among producers, and that there are hundreds...
Assume that consumers view tax preparation services as undifferentiated among producers, and that there are hundreds of companies offering tax preparation in a given market. The current market equilibrium price is $120. Jojo’s Tax Service has a daily, short-run total cost given by TC = 100 + 4Q2. Answer the following questions: How many tax returns should Jojo prepare each day if her goal is to maximize profits? How much will she earn in profit each day? A perfectly competitive...
Assume that consumers view tax preparation services as undifferentiated among producers, and that there are hundreds...
Assume that consumers view tax preparation services as undifferentiated among producers, and that there are hundreds of companies offering tax preparation in a given market. The current market equilibrium price is $120. Jojo’s Tax Service has a daily, short-run total cost given by TC = 100 + 4Q2. Answer the following questions: How many tax returns should Jojo prepare each day if her goal is to maximize profits? How much will she earn in profit each day? A perfectly competitive...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From the April 2004 Issue Save Share 8.95 In 1991, Progressive Insurance, an automobile insurer based in Mayfield Village, Ohio, had approximately $1.3 billion in sales. By 2002, that figure had grown to $9.5 billion. What fashionable strategies did Progressive employ to achieve sevenfold growth in just over a decade? Was it positioned in a high-growth industry? Hardly. Auto insurance is a mature, 100-year-old industry...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT