Question: A pump is needed to quickly drain a small pond before the earth dam fails. Water must be pumped over the top of the dam,

A pump is needed to quickly drain a small pond before the earth dam fails. Water must be pumped over the top of the dam, which is about 2 m above the water surface. The only pump available is an old 10-cm diameter propeller pump. The power requirement for the motor is 1,000 watts, and the pump motor combination has a low efficiency of 50 percent. How many centimeters will the lake go down in the initial 24-hour period if the lake has a surface area of 5, 000 square meters? (Note: Both friction losses and minor losses are insignificant when compared to the position head the pump must overcome.)

Step by Step Solution

★★★★★

3.41 Rating (164 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

P o P m e 1000 watts05 500 watts Nmsec Po ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

884-P-M-F-M (819).docx

120 KBs Word File

Students Have Also Explored These Related Mechanics Questions!

A pump is needed to deliver 40,000 gpm of gasoline at 20C against a head of 90 ft. Find the impeller size, speed, and brake horsepower needed to use the pump families of (a) Fig. 11.8; and (b) Fig....

1. A pump is needed to lift 750 L of water per minute a distance of 25.0 m. What power (in kW) must the pump be able to deliver? (1 L of water has a mass of 1 kg.) 2. A machine is designed to perform...

A cutting tool uses a nozzle that generates a high speed jet of liquid water. Assume an exit velocity of 1000 m/s of 20oC liquid water with a jet diameter of 2 mm (0.002 m). How much mass flow rate...

According to the PMBOK Guide, "the WBS is a deliverable-oriented hierarchical decomposition of the work to be executed by the project team, to accomplish the project objectives and create the...

Risk Register Workbook Instructions This template is to be used for identifying risks and creating plans for how to avoid them (negative risks) or how to m managing them throughout the project. The...

prepare graphs showing : (a) the daily output compared to design and effective capacity (b) cumulative output compared to cumulative design and effective capacity what do these tell us about the...

5 . 1 . 2 . A pump is needed to drain water from a small pond before the earthen dam collapses. The water must be pumped over the top of the dam, which is about 2 m above the water surface. The only...

The Crazy Eddie fraud may appear smaller and gentler than the massive billion-dollar frauds exposed in recent times, such as Bernie Madoffs Ponzi scheme, frauds in the subprime mortgage market, the...

How did the firm respond to this challenge based on the article belowwhat purchasing, inventory management, recycling solutions, or other techniques were used to counter it? Automakers like General...

Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...

Describe the features of a perfectly competitive market and the demand curves of firms in this market and their profit maximization conditions.(7marks)

Suppose that X has a Poisson distribution with a very large mean . Explain why the distribution of X can be approximated by the normal distribution with mean and variance . In other words, explain...

Six statements about check digits are given below, but they are not in the correct order. Put the statements into their correct sequence. i a human operator will be asked by the computer to re-enter...

2. Using the data given in question 1, what is the impact of adding net exports? Let imports equal $75 billion, and assume exports equal $50 billion. What is the equilibrium level of employment and...

A system consisting of an ideal gas at the constant pressure of 120 kPa gains 960 J of heat. Find the change in volume of the system if the internal energy of the gas increases by (a) 920 J (b) 360 J.

(a) If the internal energy of a system increases as the result of an adiabatic process, is work done on the system or by the system? (b) Calculate the work done on or by the system in part (a) if its...

(a) Find the work done by a monatomic ideal gas as it expands from point A to point C along the path shown in FIGURE 18-27. (b) If the temperature of the gas is 267 K at point A, what is its...

Question 11 Cash flows from net income. 0/4 points activities are generally the cash effects of transactions and other events that enter into the determination of 1) financing 2) investing 3)...

An important factor in selling a residential property is the number of times real estate agents show a home. A sample of 16 homes recently sold in the Buffalo, New York, area revealed the mean number...

Yeatman Co. is considering an investment that will have the following sales, variable costs, and fixed operating costs: This project will require an investment of $15,000 in new equipment. The...