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1kg of air (R 287 J/kgK) fills a weighted piston-cylinder device at 50kPa and 100°C. The device is cooled until the temperature is 0°C. Determine the work done during this cooling.

Akira Kido asked Sep 23, 2020

by Akira Kido

5.8k points

1 answer

5 votes

118k views

Compute the thermal efficiency of a Rankine cycle with isentropic compression and expansion for which steam leaves the boiler as saturated vapor at 6 MPa and is condensed at 50 kPa.

Paul Wasilewski asked Sep 23, 2020

by Paul Wasilewski

5.2k points

1 answer

1 vote

123k views

What minimum radius of curvature may be designed for safe operation of vehicles at 70 mi/hr if the maximum rate of superelevation (e) is 6% and the maximum coefficient of side friction (f) is 0.10?

Kaluva asked Sep 23, 2020

by Kaluva

7.6k points

1 answer

3 votes

124k views

Consider two closed systems A and B. System A contains 300 kJ of thermal energy at 20C, whereas system B contains 200kJ of thermal energy at 50oC. Now the systems are brought into contact with each other.

Specur asked Sep 23, 2020

by Specur

6.2k points

1 answer

3 votes

42.7k views

What are the functions of a gear

Jason Morrison asked Sep 23, 2020

by Jason Morrison

6.5k points

2 answers

4 votes

151k views

A disk-shaped part is cast out of aluminum. The diameter of the disk = 650 mm and thickness = 16 mm. If the mold constant = 2.2 sec/mm2 in Chvorinov's rule, how long will it take the casting to solidify?

RamBabu Pudari asked Sep 23, 2020

by RamBabu Pudari

6.3k points

1 answer

3 votes

84.9k views

Which of the two, Co or Ni, do you expect to have higher strength? Give your reasoning.

Blackbourna asked Sep 23, 2020

by Blackbourna

6.6k points

1 answer

0 votes

179k views

Water is boiled in a pan covered with a poorly fitting lid at a specified location. Heat is supplied to the pan by a 2-kW resistance heater. The amount of water in the pan is observed to decrease by 1.

Martijn Smidt asked Sep 23, 2020

by Martijn Smidt

5.8k points

1 answer

3 votes

93.0k views

Shortly after the introduction of a new coin, newspapers published articles claiming the coin is biased. The stories were based on reports that someone had spun the coin 200200 times and gotten 108108

Death Metal asked Sep 23, 2020

by Death Metal

5.9k points

1 answer

0 votes

128k views

A vessel contains ethane at a temperature of 100C and a pressure of 10Mpa . The ethane is heated up in a constant pressure process. Calculate the final temperature of the ethane if teh volume increase

Pankaj Mahato asked Sep 22, 2020

by Pankaj Mahato

5.5k points

1 answer

0 votes

218k views

An ideal gas with k = 1.4 is flowing through a nozzle such that the Mach number is 1.6 where the flow area is 70 cm2. Approximating the flow as isentropic, determine the flow area at the location where

Jdm asked Sep 22, 2020

by Jdm

5.9k points

1 answer

0 votes

97.5k views

Consider insulation on a circular pipe For the same thickness and type of insulation, the thermal resistance of the insulation is (a) Higher for larger diameter pipes (b) The same for all pipes independent

WYS asked Sep 22, 2020

by WYS

6.1k points

1 answer

0 votes

57.8k views

A small circular plate has a diameter of 2 cm and can be approximated as a blackbody. To determine the radiation from the plate, a radiometer is placed normal to the direction of viewing from the plate

Albertgasset asked Sep 22, 2020

by Albertgasset

5.5k points

1 answer

5 votes

147k views

When designing a car that runs on wind or Air car . can you tell me the details for the following points Compressed Air Engine: a). what is the Exact mechanism and components required. for it b).and why

Albert Vonpupp asked Sep 22, 2020

by Albert Vonpupp

6.1k points

1 answer

3 votes

161k views

A piston-cylinder apparatus has a piston of mass 2kg and diameterof 10cm resting on a body of water 30 cm high atmospheric pressureis 101 kpa, and the temperature of water 50 degrees Celsius. What is the

HolKann asked Sep 22, 2020

by HolKann

6.6k points

1 answer

2 votes

20.2k views

Inspection with considering a variable uses gages to determine if the product is good or bad. True or False?

Pooja Gaonkar asked Sep 22, 2020

by Pooja Gaonkar

5.8k points

2 answers

1 vote

90.7k views

How is the fuel introduced into the Diesel engine?

Binod Kalathil asked Sep 22, 2020

by Binod Kalathil

5.6k points

1 answer

4 votes

127k views

In a four bar mechanism, L, is a fixed link; L2 is driver crank; L3 is coupler and L4 is follower crank. L=27 cm, L3 =5 cm and L4=10 mm. Find the length of the link L1 if the linkage can be classified

Tharindu Madushanka asked Sep 22, 2020

by Tharindu Madushanka

6.2k points

1 answer

1 vote

97.1k views

A 30-tooth gear has AGMA standard full-depth involute teeth with diametral pitch of 12. Calculate the pitch diameter, circular pitch, addendum, dedendum, tooth thickness, and clearance.

Dylan Hughes asked Sep 22, 2020

by Dylan Hughes

5.3k points

1 answer

5 votes

113k views

What is the MINIMUM capacity, in kW, required to heat 1,000 cfm (472 L/s) from 65°F (18.3°C) to 95°F (35.0°C)? A. 2 B. 10 C. 20

Sdonk asked Sep 21, 2020

by Sdonk

5.5k points

2 answers

0 votes

130k views

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