How can we prevent and control noise pollution in the workplace?

Q: what is the required force to move a car (1300 kg) from rest to 80 m (with a 20 m/sec)?

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Q: Water flows through a horizontal pipe of cross sectional of 20 cm2. At one section, the cross…

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Q: Q8) Define stefen_ Boltzman law of thermal radiation?

A: Define the stefen boltzman law of thermal radiation .

Q: Find the work done (in J) by a force, F=3i+ 8j N acts on a particle and displaces it Ar = 2i - 7j m.

A: Ans(a)  Displacement, x=2.6m Resolve the force, only x-direction force is considered because…

Q: If Cv is 723.3 J/kgK for air, then its Cp value is ____________ A. 1.012 J/kgK B. 1.012 kJ/kgK C.…

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Q: Explain how Electrical energy is generated in nuclear power plant. What are the harmful effects of…

A: In a nuclear power plant electricity is generated by the turbine. They don't produce green house gas…

Q: Explain how this law was derived with a detailed and accurate explanation? E G = 2(1 + v)

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Q: Sometimes in listening to the sound of a twin propeller engine airplane, the hum of the engines is…

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Q: For adiabatic process, pressure before and after the process are 4000000 N/m2 and 2 bar…

A: P1=4000000 N/m2=40*105 N/m2= 40 barP2=2 barV1=4000 mm3V2=400 cm3=400000 mm3

Q: An apple loses 3.6 kJ of heat as it cools per °C drop in its temperature. The amount of heat loss…

A: heat loss of apple 'Q'= 3.6 KJ            △Q△T=3.6 KJC°

Q: 16. What is the most nearly the combined volume of 1.0g of hydrogen gas and 7.0g of helium gas when…

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Q: A vessel having a capacity of 0.05 m3 contains a mixture of saturated water an saturated steam at a…

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Q: Specific Heat Problems: a. The boiler in a canteen contains 6.75 kg of water at 10°C. How much heat…

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Q: A cement truck with four-stroke diesel engine has 6 cylinders. The bore and stroke of each cylinder…

A: Given that, Number of cylinder, k=6,Number of stroke=4Bore, D=713 mm,Stroke, L=1962 mm,Mean…

Q: Enthalpy is ......... internal energy       a)greater than       b)less than       c)none of these…

A: enthalpy is the combination of two properties, i.e. internal energy and flow energy.

Q: How much heat, KJ must be transferred to 20 kg of air to increase the temperature from 20oC to 280oC…

A: Givenairm=20kgT1=20oCT2=280oC

Q: Show and draw the figure of the problem below. Neat and clean solution The enthalpy of air is…

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Q: 47  It is the amount of heat required to raise the temperature of a given mass by 10C ? Select one:…

A: Heat capacity is the amount of heat required to raise the temperature of a given mass by 1°C.

Q: 1500# 1500# 1500# 1500# 12' K I

A: In this problem, following steps will be taken 1. Determine the reactions at the supports.' 2. Using…

Q: 3(2).How can we prevent and control noise pollution in the workplace?

A: If a person in the workplace is exposed to the sound of intensity above 85 dB can cause the hearing…

Q: Quality of refrigerant R134a is decreased from 90% to 20%. Which one of the properties will not be…

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Q: The quality of water is decreased from 100% (saturated vapor) to 50%. Which one of these will not be…

A: when water qualitu decreases from saturated vapor to towards saturated liquid, then its a phase…

Q: Work done in an adiabatic process between a given pair of end states depends on: (a) the end states…

A: It is required to determine work done for adiabatic process

Q: If Cp is 1.012 kJ/kgK for air, then its Cv value is ____________

A: We have to find Cv

Q: When a system undergoes a constant volume process (P = 5 bar), the change in internal internal is 5…

A: First law of thermodynamics: The first law of thermodynamics states that "Energy can never be…

Q: t=270°C s= 6.5 kJ/kg-K What is the state of the pure substance?

A: It is not necessary for a pure material to consist of only one element or compound. As long as the…

Q: Question 57 A jet plane travels in air at pressure of 101.325 kPa and 10°C at a speed of 2000 kph.…

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Q: The surface tension of soapy water at 20 °C is σs =0.028 N/m. What would be the effective pressure…

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Q: Which physical quantity can be measured with RTD? a. Flow b. Temperature c. Pressure d. Level

A: RTD- it is resistance temperature detector also known as resistance thermometer is a type of sensor.

Q: 1.a) Take a couple of thermodynamic potentials (Gibbs free energy, Helmholtz free energy, entropy,…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Explain enthalpy, entropy, and internal energy

A: All these three terms are property of a system.

Q: 91: The DBT ot atmospheric air is 21°C and DPT is 15 °C. The atmospheric pressure of air is 749.5 mm…

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Q: Air expansion at constant pressure and produced work 5 KJ , if Cp 1.005 KJ / kg.K,R = 0.287 KJ /…

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Q: Cold water at a rate of 30 L/min is mixed with hot water at 44 L/min in a continuous manner in a…

A: Find the mass flow rate out from the mixture Flow rate of cold water = 30 L/min Flow rate of hot…

Q: At 2:30 pm, a certain themometer reading 90°F is taken outdoors where the air temperature is 25°F.…

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Q: Steam at a temperature of 250°C has a specific volume of 0.15436 cubic meter/kg. What are the…

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Q: What does utilitarianism tell us about the behavior of the Aberdeen Three? What do duty and rights…

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Q: By actual measurement, the enthalpy of steam at 8 bar is found to be              3000 KJ/Kg. What…

A: 1. Given:P1=8 barActual enthalpy, h1=3000KJKgAt 8 bar pressure, enthalpy of…

Q: An engine uses a fuel which, when tested at 35°C with a 15.6°C hydrometer showed a relative density…

A: Given,Relative density, SG=0.905Tested temperature, T=35°CHydrometer temperature, Th=15.6°CHigher…

Q: How can we ensure the safety of the workers, the assets and the environment in an industrial…

A: Understand the risks. Once you know the particular hazards of your job or workplace, you can take…

Q: 11. To how many atmosphere pressure must a liter of gas measured at 1 atm, and -20°C be subjected,…

A: Given:V1=1 LP1=1 atm =101.325 KPaT1=-20°C =253 KV2=0.5 LT2=40°C =313 K

Q: Find these set of values in the steam table: Saturated Steam Enthalpy:(h) 1. @20MPa 2. @100KPa 3.…

A: Given data  To determine the Saturated Steam Enthalpy(h) at given condition.

Q: A rigid container contains 0.15 m3 of 20oC air at a pressure of 1500 kpa. What will be the pressure…

A: Given that: For the rigid container, V1 = 0.15 m3, T1 = 20 oC, P1 = 1500 kPa T2 = 5 oC It is…

Q: How do dirt bikes work?

A: Dirt bike: This bike used to run on rough terrain.

Q: The atmospheric pressure at the top and bottom of a building are 101 kPa and 98 kPa, respectively.…

A: Draw the diagram as shown below. Given the atmospheric pressures at the top,  p1=101 kPa and bottom…

Corrosion control methods

Corrosion may be defined as the method in which metals are attacked on their exteriors by gases existing in the atmosphere, converting them to their oxides, nitrides, sulfides, etc.