Consider a 1200 kg car cruising steadily on a level road at 90 kph. Now the car starts climbing a hill that is sloped 30 o from the horizontal. If the velocity of the car is to remain constant during climbing, determine the additional power that must be delivered by the engine.

Q: In a certain process, energy entering is 1500 KJ/kg and 150 m/s. If the energy leaving is 1200…

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Q: Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel.…

A: Given data: The heat transferred to the water is Q1=30 kJ. The heat lost by the surroundings is…

Q: motor-pump system with 90% efficiency is designed to increase the pressure of was from 101kPa to 250…

A: Hh

Q: A 0.75-m3 rigid tank initially contains air whose density is 1.18 kg/m^3. The tank is connected to a…

A: Given:- V=0.75m3 ρ1=1.18 kg/m3 ρ2=4.95 kg/m3 To find:- Mass of air entered in tank(mair)=?

Q: A garden hose attached with a nozzle is used to fill a 40-liter bucket. The inner diameter of the…

A: Given Data The volume of the bucket is: V=40 L The inner diameter of the hose is: d=2 cm=0.02 m The…

Q: Determine the work interaction when a gas absorbs 12 kJ of heat which cause the internal energy to…

A: Givenq=12 kJE=30 kJAskedWork done=?SolutionE=q+W

Q: A water tank initially contains 140 L of water. Now, equal rates of cold and hot water enter the…

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Q: A 900 kg car cruising at a constant speed of 60 km/h is to accelerate to 100 km/h in 6 s. The…

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Q: Determine the energy needed to accelerate an 800-kg car from rest to 100 kph.

A: Given data: u=0 m/sv=100 km/h=27.78 m/sm=800 kg Need to determine the energy required.

Q: A 2.5-m3 rigid tank initially contains air whose density is 1.18 kg/m3. The tank is connected to a…

A: Option A is correct.    m = 25.4678 lb

Q: What is the kinetic energy of an 1800 kg car moving at 25 m/s?

A: Given data : Mass m=1800 kg Velocity V=25 m/s   Required : Kinetic energy

Q: If the work done by a conservative force on a particle as it moves between two positions is –10 N·m,…

A: Conservative force and potential energy.

Q: 15. Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel.…

A:

Q: In a hydroelectric power plant, water enters the turbine nozzles at 760 kPa absolute with a low…

A: In a hydraulic power plant, water enters with a low velocity so It is assumed that the velocity at…

Q: Energy is added to a piston-cylinder arrangement, and the piston is withdrawn in such a way that the…

A:

Q: Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel.…

A:

Q: A wind turbine has a blade length of 30 m. In a given day, average speed of wind for 5 hours is 9…

A:

Q: In a piston-cylinder arrangement, energy is added and the piston is withdrawn in such a way that the…

A:

Q: How do the energies of a flowing fluid and a fluid at rest compare? Name the specific forms of…

A: we will discuss the different energies of static vs owing fluid

Q: Determine the heat interaction when a gas does 12 kJ of work which cause the internal energy to…

A: GivenW=12 kJE=30 kJAskedq=?SolutionE=q+W

Q: The kinetic energy of a 2200-kg vehicle is absorbed by two springs. Determine the appropriate spring…

A: Given data: m=2200 kgv=16 m/sx=100 mm Need to determine the appropriate soring constant.

Q: The elevator of a large building is to raise a net mass of 550 kg at a constant speed of 12 m/s…

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Q: The first law of thermodynamics states that the energy of the universe is constant (ΔU = q - w),…

A: The fundamental equation of entropy is as follows:

Q: A wind turbine has a blade length of 30 m. In a given day, average speed of wind for 5 hours is 9…

A: Wind Turbine is a device that converts mechanical energy into electrical energy. The kinetic energy…

Q: The pressure of water is increased from 100 kPa to 700 kPa by a pump. The density of the water is 1…

A: Given: The initial pressure of the water is P1=100 kPa. The final pressure of the water is P2=700…

Q: In an air motor cylinder the compressed air has an internal energy of 450 kJ/kg at the beginning of…

A: Considering air moor cylinder as our systemGiven:Work done by sysem,W=+120KJKgIniial inernal energy…

Q: A 60 mm diameter pipe enlarges to a 90 mm diameter pipe. In the smaller pipe, the density of a…

A: given; →inlet pipe diameter(D1)=60mm=0.06m→outlet pipe diameter(D2)=90mm=0.09m→inlet…

Q: Four kilograms of saturated liquid water is maintained at a constant pressure of 600 kPa while heat…

A: Given: m = 4 kg x_1 = 0 P1 = 600 kPa P2 = P1 = 600 kPa T2 = 600 C     To find: Work done by the…

Q: Calculate the work done by a gas if it expands from volume 1m3 to 2m3 at constant atmospheric…

A: given data:-  inital volume = 1 m^3 final volume = 2 m^3 find the work done by a gas at atmospheric…

Q: A damaged 1200-kg car is being towed by a truck. Neglecting the friction, air drag, and rolling…

A: Q Given Data:A damaged car of mass 1200kgTo Determine -a) Power required for constant velocity of…

Q: A 2-m3 rigid tank initially contains air whose density is 1.18 kg/m3 . The tank is connected to a…

A: Given: The volume of the rigid tank is V=2 m3. The initial density of the air is ρ1=1.18 kg/m3. The…

Q: 4. In an air motor cylinder the compressed air has an internal energy of 450 kJ/kg at the beginning…

A: Given, U1 = 450 kJ/kg U2 = 220 kJ/kg W = 120 kJ/kg Required :- Heat flow to or from the cylinder

Q: A0.2-kg rocket is launched from rest and rises 29 m above its starting point. In the process, 425 J…

A: Given     Mass, m = 0.2 kg   Height , h = 29 m

Q: A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors…

A: Given data: The subscript “i” is used for the inlet conditions and subscript “e” is used for the…

Q: Determine the work done in KJ in a piston which has a constant pressure of 25 psi. Its initial…

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Q: For a closed system, the difference between the heat added to the system and the work done by the…

A: First law of thermodynamics states that the heat transfer through a thermodynamic system is equal to…

Q: A 20,000 kg train car traveling at 8 m/s crashes into a 30,000 kg train car at rest and the two cars…

A: Let us denote 20,000 kg train by subscript 1 and 30,000 kg train by subscript 2. Given, m1 = 20,000…

Q: 5. Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel as…

A: Heat added = 30 KJHeat lost = - 5 KJ

Q: An oil pump is drawing 44 kW of electric power while pumping oil with ρ = 860 kg/m3 at a rate of 0.1…

A: First, we calculate the mechanical power output…

Q: 2.21 kg/m3 is the flow rate of air entering a nozzle steadily and at 20 m/s and leaves at 0.762…

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Q: A certain weight lifting machine of velocity ratio 30 can lift a load of 1500 N with the help of 125…

A: Given Data: Velocity ratio, Vr=30

Q: Helium is used in a Carnot engine where the volumes beginning with the constant temperature heat…

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Q: To dramatize the loss of energy in an automobile, consider a car having a weight of 5000 lb that is…

A: Given Data⇒WeightW=5000 Lbsince g=32.2 fts2mass m=Wg=500032.2 speedv=35mihr1 mi =5280 ftconvert this…

Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.