(a) How much energy is necessary to heat 2.5 kg of water from room temperature (20°C) to its boiling point? (Assume no energy loss.) 1971080 kcal (b) If electrical energy were used, how much would this cost at 55¢ per kWh? ¢

Q: A fluorescent tube has a power rating of 52 W. It is also left on for 3 hours, and 92 170 J of…

A: Efficiency is a measure of how well a device converts input energy into useful output. In the…

Q: By how much must one lower the temperature of a 65 – g of aluminum to change its internal energy by…

A:

Q: Let us use a heat pump to cook dinner! You set up a heat pump that has 40 % of its theoretical…

A:

Q: Confirm that the units nRT of are those of energy for each value of R : (a) 8.31 J/mol.K, (b) 1.99…

A: units of nRT

Q: An electrical power station requires 1.1 × 1014 J of heat transfer into the engine and has an…

A:

Q: Calculate the net work output of a heat engine following path ABCDA in the figure below.

A:

Q: 54 : Two kilocalories are supplied to a system, the internal energy of the system rises by 5030…

A: Description : In this question we have to calculate the value of J while we have the rising energy…

Q: (a) Determine the work done on a fluid that expands from I to f as indicated in Figure to the right.…

A: A pressure vs volume graph.Note:Find:(a) Work-done on  fluid that expands from to (b) Work-done on…

Q: When the outlet temperatures of the fluids in a heat exchanger are not known, is it still practical…

A:

Q: This problem compares the energy output and heat transfer for the environment by two different types…

A:

Q: For the process shown in the figure below, answer questions 7, 8, and 9 when the system consist of…

A:

Q: Does a refrigerator full of food consume more power if the room temperature is 20C than if it is…

A: Coefficient of performance of the refrigerator is inversely proportional to the temperature…

Q: Given the information appearing in Fig. 4.127, determine: b. VE a. Ic C. V cc CC e. V B d. V CE f.…

A: Given, Base current, IB=20μA Gain, β=100 Emitter resistance, RE=1.2×103Ω Collector resistance,…

Q: Alice, whose mass is 55 kg, eats a jelly doughnut for breakfast. According to the nutrition label,…

A: The energy possessed by an object when it is raised to an height h above the ground is known as the…

Q: In order not to damage the resistance in the kettles, the difference between the temperature of the…

A:

Q: (a) What is the best coefficient of performance for a refrigerator that cools an environment at…

A: Part (a) Given: The temperature that transfer the heat is T1=45 C. The temperature that cools the…

Q: A photovoltaic panel with an efficiency of 19 % receives an average insolation of 168 W/m². Estimate…

A: Efficiency of the photovoltaic (PV) panel =19% = 0.19 .The average power that the PV panel required…

Q: A 220-volt 2 ampere electric kettle contains 5 kg. of water at 21° C. It is required to bring it to…

A: Step 1 The efficiency of the kettle can be calculated using the standard formula as below, Here…

Q: A window conducts power from a house to the cold outdoors. What power is conducted through a window…

A: The conduced power through a window is directly proportional to the area. It can be given as, Q∝A…

Q: In an isovolumetric process by an ideal gas, the system's heat gain is equivalent to a change in…

A: Isovolumetric process, isochoric process or  isometric process is a thermodynamic process in which…

Q: 50 g of water is split into hydrogen and oxygen using electrolysis at 27oC. Calculate the work done.

A: Given: mass of water = 50 g  temperature T = 27o C = 27+273 =300 K   Knowns: atmospheric pressure P…

Q: The mass of a ship before launch is 55,000 metric tons (ton metric|]. The ship is launched down a…

A:

Q: A 150 Hb.- ball initially on the top of a 20ft ladder is d ropped and hits the ground.With re…

A: Given : Mass of ball = 150 lb Initial Velocity of ball = 0 ft/s Initial height of ball =  20 ft

Q: 14.) A fixed mass of an ideal gas is heated from 60C to 90C at a constant volume. (a) 1m^3 and (b)…

A:

Q: g of water is split into hydrogen and oxygen using electrolysis at 27oC. Calculate the w

A: Given values:- Mass of water,(m)=50 g=0.05 kg -----(1) Latent heat of water,(c)=540 J/kg-0C ----(2)…

Q: 250 J of heat leaves the system and 355.75 J of work is done on the system. Get the change of…

A: Given value--- 250 J of heat leaves the system . 355.75 J of work is done on the system. We have…

Q: A(n) 88-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.2 s. (a) Calculate the…

A: Given that, Mass of the sprinter is m = 88 kg. The sprinter accelerates from rest thus initial…

Q: Find the direct normal and horizontal extraterrestrial radiation at 1 PM solar time on April 18 for…

A: Declination angle on 18 April, δ=23.45sin360365284+nn=Jan days+feb…

Q: (1) An incandescent light bulb produces 5.85 Joules of light energy each second. This bulb is 7.80%…

A: Given data:Incandescent light bulb light energy per second: 5.85 Joules/secondIncandescent light…

Q: This problem compares the energy output and heat transfer to the environment by two different typ…

A: Given:- The normal efficiency of  η1= 32.16%  η2= 43.52% The same heat transfer into the engine in…

Q: Consider a room that is initially at the outdoor temperature of 20oC. The room contains a 40-W…

A: Given Data:Power in a lightbulb Power in a TV set Power in a refrigerator Power in a iron  Assuming…

Q: For a total PV module of 25m2, what would be the PV power for each if conversion efficiency is 15%…

A: The area of the PV module is, A=25 m2. The conversion efficiency is, e=15%=0.15.

Q: A 3 ohm heater takes 6 amperes while submerged in 1200 grams of water contained in a vessel with a…

A: Given:- m= 1200 g = mass of water  mo= 200 g = water equivalent of vessel S= 4.184 J/g-°C = specific…

Q: An electric kettle was marked 500 Watt, 230 volt and was found to bring one kg of water at 15 degree…

A:

Q: While walking 300000J give off, the internal energy decreased by 750000J. Find the work ??

A:

Q: Q3/ a/ IIRNACE On= 80MW net,out НЕ OL = 50 MW RIVER Determine thermal efficiency

A:

Q: urages its customers to replace their incandescents (power = 75 W) with compact fluorescent lamps…

A: Given as, 10, 000 hrs= 75 W x 10,000 = 750 Kwh

Q: An asteroid made out of iron (7860 kg/m3) strikes the Earth in an area where the oceans are very…

A: Given data: The density of asteroid is ρ=7860 kg/m3. The speed of asteroid is v=30 km/s. The…