Recent questions in Engineering

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The army has cars and boats etc right

Gilbertohasnofb asked Aug 12, 2020

by Gilbertohasnofb

5.4k points

1 answer

4 votes

136k views

A heating system supplies 20 gpm of hot water at 200°F to a base board fin-tube radiation for a heating load of 92.000 Btu/hr. What is the exit temperature of the hot water?

Dubbaluga asked Aug 12, 2020

by Dubbaluga

5.8k points

1 answer

4 votes

136k views

A delicate telescope mirror and support that can be modelled as a mass-spring system with mass of 12 kg and support stiffness of 10,000 N/m and a damping ratio of 0.08 is set into motion with an initial

Richlewis asked Aug 12, 2020

by Richlewis

5.6k points

1 answer

3 votes

174k views

Indicate whether the following statements are true or false for a reversible isothermal process:(A) Q=T(∆S). (B) ∆U=0.(C) The entropy change of the system is always zero.(D) The total entropy change of

Giupardeb asked Aug 12, 2020

by Giupardeb

5.7k points

1 answer

0 votes

60.1k views

A hypothetical metal alloy has a grain diameter of 1.7 ´ 10-2 mm. After a heat treatment at 450°C for 250 min the grain diameter has increased to 4.5 ´ 10-2 mm. Compute the time required for a specimen

Taocp asked Aug 12, 2020

by Taocp

5.6k points

1 answer

0 votes

197k views

For a brittle material that has a specific surface energy of 0.33 J/m2, and flexural strength and elastic modulus values of 88.1 MPa and 61 GPa, respectively, calculate the critical stress (in MPa) required

Kozolovska asked Aug 12, 2020

by Kozolovska

5.5k points

1 answer

2 votes

151k views

Four kilograms of gas were heated at a constant pressure of 12 MPa. The gas volumes were 0.005 m^3 and 0.006 m^3 in the initial and final states, respectively, and 3.9 kJ of heat was transferred to the

Clarkeye asked Aug 12, 2020

by Clarkeye

5.5k points

1 answer

4 votes

165k views

What is the difference between a discrete and continuous system?

Andoni Zubizarreta asked Aug 12, 2020

by Andoni Zubizarreta

5.9k points

1 answer

4 votes

41.2k views

If the local atmospheric pressure is 14.6 psia, find the absolute pressure (in psia) in a column of glycerin (rho = 74.9 lbm/ft^3) at depth of 27in.

Jwalin Shah asked Aug 12, 2020

by Jwalin Shah

6.1k points

1 answer

3 votes

220k views

Tire problems such as leaks and vibrations can MOST-Likely be traced to: A) improperly mounted tires B) axial movement C) tire rotation D) radial movement

Paulus asked Aug 12, 2020

by Paulus

6.0k points

1 answer

1 vote

16.2k views

Thermal efficiency of a heat engine is defined to be the ratio of energy output desirable to energy input. Would you think that efficiency is an appropriate definition to be used when a heat pump is being

Laynor asked Aug 12, 2020

by Laynor

5.0k points

1 answer

1 vote

157k views

A closed, rigid tank is filled with a gas modeled as an ideal gas, initially at 27°C and a gage pressure of 300 kPa. If the gas is heated to 77°C, determine the final pressure, expressed as a gage pressure,

Molikh asked Aug 12, 2020

by Molikh

6.5k points

1 answer

0 votes

182k views

A 200 liter tank is connected to a line flowing nitrogen (N2) at 30°C and 10 MPa pressure. The tank initially contains nitrogen (N2) at 30°C, 101 kPa. The valve is opened, allowing nitrogen to flow into

Davide Berra asked Aug 12, 2020

by Davide Berra

5.4k points

1 answer

1 vote

31.4k views

When you accelerator is stuck

Allan Mwesigwa asked Aug 12, 2020

by Allan Mwesigwa

5.6k points

1 answer

0 votes

213k views

A platform and a weight totaling 900 N is held in position by a vertical water jet of 5 cm diameter. Determine the velocity of the jet.

Nephi asked Aug 12, 2020

by Nephi

5.3k points

1 answer

4 votes

138k views

Air with a mass flow rate of 2.3 kg/s enters a horizontal nozzle operating at steady state at 450 K, 350 kPa, and velocity of 3 m/s. At the exit, the temperature is 300 K and the velocity is 460 m/s. Using

Sergio Ivanuzzo asked Aug 12, 2020

by Sergio Ivanuzzo

5.6k points

1 answer

1 vote

80.5k views

Which branch of engineering most closely relates to mechanical engineering? A polymer engineering B. environmental engineering C. electronics engineering D. mechatronics engineering

Inder Kumar Rathore asked Aug 12, 2020

by Inder Kumar Rathore

5.7k points

2 answers

3 votes

173k views

An 800-kg drag racer accelerates from rest to 390 km/hr in 5.8 s. What is the net impulse applied to the racer in the first 5.8 seconds? If the net tangential force applied to the racer is constant, what

ISanych asked Aug 11, 2020

by ISanych

5.5k points

1 answer

2 votes

175k views

Suppose a large amount of power is required. Which engine would you choose between Otto and Diesel? Why?

Ken Zhang asked Aug 11, 2020

by Ken Zhang

5.8k points

1 answer

4 votes

142k views

When they say in the United States that a car’s tire is filled “to 32 lb,” they mean that its internal pressure is 32 lbf/in² above the ambient atmosphere. If the tire is at sea level, has a volume of

Nick Vasic asked Aug 11, 2020

by Nick Vasic

5.4k points

1 answer

1 vote

28.6k views

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