Describe how a fuel-cell-powered vehicle works.

Q: Figure Q1c shows a bracket on rollers that allow the bracket to move along a beam in the horizontal…

A:

Q: The jet plane starts from rest at s=0 and is subjected to the acceleration shown. Suppose that…

A: According to the given data s'=1000ft We need to find Time at which the plane traveled 1000ft

Q: Figure Q1c shows a bracket on rollers that allow the bracket to move along a beam in the horizontal…

A:

Q: The 2.5-Mg van is traveling with a speed of 100 km/hr when the brakes are applied and all four…

A: The mass of the van is M = 2.5 Mg. The initial speed of the car is u = 100 km/hr. The final speed of…

Q: Determine the maximum load F that can be applied at the free end of a 3 m cantilever beam of…

A:

Q: a.Which of the following appropriately describes the pumping energy efficiency when a pump is…

A: please refer handwritten solution

Q: The block diagram of a mechanical transmission system shown in Figure Q11, where K is a positive…

A: Transfer function: TF=k(s+20)s(s+1)(s+10) Find the two real axis segments:

Q: A particle of mass m = 1 kg arrives at point O with a horizontal velocity vo and starts rolling do a…

A: Given: m=3 kgR=5 mk=60 N/m

Q: Which parameter is not involved in the linear impulse and momentum equation? a. Velocity b.…

A: Impulsive Force: 1. The impulsive force is the amount of force that's needed to cause a certain…

Q: A drum of height h and area A, standing and open to the atmosphere at its top, is filled with water.…

A: Given data: Find: How long will it take for the drum to empty?

Q: What is the radius of the blades, if the height of the blades is 0.1636 and the hub diameter is 0.42

A: The radius of the blades.

Q: B- Compare between the following: 1-Direct and reverse return closed piping systems. 2- Single stage…

A: According to  the given data We need to compare The Direct and reverse return closed piping…

Q: 2 An object is made of two identical uniform 3m long rods connected as shown. The total mass of the…

A:

Q: R-134a at 320 kPa and 40 C undergoes an isobaric process in a closed system until its quality is 45…

A: The change in internal energy, heat transfer, work done, and the entropy generated. Given: The…

Q: A pipe with an inside diameter of 42 mm is subjected to an axial load of 850 kN. If the maximum…

A: The Inside diameter of the pipe, (di)=42 mm. The axial load on the pipe,(P)=850 kN. The allowable…

Q: Determine the specific heat capacities at constant volume and constant pressure for nitrogen, given…

A: Given : Gas : Nitrogen    (A diatomic gas)Molecular weight (M) = 28 grammolAdiabatic index for…

Q: Pressure is applied from a gas cylinder to one side of a U-tube manometer with constant internal…

A: Given data: the density of water (ρ) = 999 kg/m3 internal diameter of tube = D x = 4 cm    To…

Q: 5. The 200-g projectile is fired with a velocity of 900 m/s towards the center of the 15-kg woode…

A: Given data is

Q: (a) Find the centroid(x,y) of the composite area shown below. (b) Determine the area moment of…

A: Given: Find: a) Centroid (x,y) of the composite area. b) The area moment of inertia (lx, and ly) of…

Q: A circular rigid disk of mass m kg and radius rm is pushed by a bumper with a force of F N along a…

A:

Q: 15. Determine the friction force if = 0.3 and M = 0.2. (A) 170 N (B) 191 N (C) 850 N (D) 294 N 300 N…

A:

Q: A 5,000-airplane strikes and upward gust of air which generates a wing lift of 25.000 lb. The…

A:

Q: Using the Method of Sections, determine the force in members BD and CD of the truss shown below. You…

A:

Q: Determine the relative roughness of cast iron pipe with inner diameter 3.8 inches.

A: Internal Diameter of the pipe (D) = 3.8 in  We take the Absolute Roughness value of Cast iron pipe…

Q: What is the tension in the cable in units of lbf ?

A: The coefficient of kinetic friction between the support and Block =0.1 Acceleration of the Block B…

Q: The figure shows the cross section of a uniform 239-lb ventilator door hinged about its upper…

A: Weight of door, W=239 lbStiffness of spring, k=16.6 lb/ft Draw the free-body diagram.

Q: The hand clamp is constructed using a square-threaded screw having a mean diameter of 36 mm, a lead…

A:

Q: Calculate the maximum shear force at support and the maximum bending moment

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Q: DETERMINE THE REACTIONS AT THE SUPPORTS FIGURE. OF THE BEAM SHOWN IN THE 1.8 kN/m 4 kN -1.6 m-1…

A:

Q: An automobile having a mass of m= 1650kg is subjected to vibration in the vertical direction while…

A: Given Data: Automobile mass m=1650 kg road have Sinusoidal amplitude Y=0.07 m wavelength λ=6.5 m…

Q: In a container of diameter Φ (see image), a tube of diameter ε (much smaller than the diameter of…

A: Given data: Diameter of the container of = Φ  Diameter of the tube = ε (much smaller than the…

Q: Obtain the Mechanical system equivalent to the above electrical System (show it as a diagram). In…

A: Given Data:   To Find: (a) Mathematical model of the mechanical system. (b) Output of the system.

Q: In Figure Q5b, a beam is supported at A and C with a uniformly distributed load (UDL) of 38.75 kN/m…

A:

Q: What are the four stages in the stress-strain curve of low-carbon steel? please quickly thanks !

A: In this problem, we have to explain four stages in the stress- strain curve of low- cabon steel.

Q: A boiler takes in feed water at 70 °C and generates steam at a pressure of 10 bar and dryness…

A: T1 = 70 o C  P2 = 10 bar x2 = 0.92 T3  = 400 oC m.s = 5 tonnes /hr = 50003600kg/s=1.389 kg/s

Q: The axle of the freight train is subjected to loadings as shown below. The diameter of the axle is…

A: Given: The diameter of axle is d=137.5 mm. Free body diagram. Here, RC is reaction force at C and…

Q: A) Choose a pump from those presented in figure 6 (you must select the most adequate model) if there…

A: Given:Required flow rate, Q=1.5 L/s=1.5×10-3 m3/s=0.0015 m3/s            1 L=10-3 m3Depth of the…

Q: the ground and free in the upper end. a) Calculate the compressive stress, then the minimum…

A: Given Data: H=3 mm=1000 kgFOS=3σut,c=241 MPaE=190 GPa   To Find: (a) The compressive stress. (b) The…

Q: An experiment is done on a single cylinder engine whose crankshaft makes two complete revolutions in…

A: Given Data: N=70000 rpmPimep=26.6 barVs=1.1 LBL=6 kgD=29.6 cmCV=30.75 MJ/kg   To Find: (a)…

Q: Q4: Find the natural frequency and the critical damping coefficient C, for the system shown in Fig.…

A: To Find : The critical damping coefficient and natural frequency of the system. Given : The Mass is…

Q: 1. Using the Taylor equation for tool wear and let: n = 0.3, calculate the percentage increase in…

A: Tool life exponent, (n)=0.3 The cutting speed is reduced by 30% and then increase by 20%. Determine…

Q: 3) Determine the force P for impending sliding motion of block A P 30° IMPENDING MOTION NAB 50lb…

A:

Q: 2) For the composite section show below, (a) Determine the centroid xc and yc with respect to the…

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Q: Determine the required force P that must be applied at the blade of the pruning shears so that the…

A: Apply moment equilibrium about point D. ∑MD=0201-Cy1.5-Cx0.5=00.5Cx+1.5Cy=20…

Q: A wall has an overall U value of 0.25 W/m^2K. It includes a layer of insulation 50 mm thick. The…

A:

Q: The 2-kg pendulum bob moves in the vertical plane with a velocity of 10 m/s when 8 = 30°. Determine…

A: According to the given data m=2kgmg=2x9.81=19.62 N R=2m when θ=30° velocity ,v=v1=10m/s θ1=30° and…

Q: Q1 A material was tested under the proportionally increasing state of stress 201= - 202 = - 03.…

A: Given Data: (a) 2σ1=-2σ2=-σ3σ1=200 MPa(b) σ1=-σ2=2σ3   To Find: (a) Yield stress of the material…

Q: The bore diameter for each cylinder in a eight-cylinder marine engine is 180 mm and the stroke…

A:

Q: A spring has a stiffness of 25 N/m and length of 1 m. Find the work done in stretching the spring…

A: According to the given data K=25 N/m L=1m L1=1.2m L2=1.6 m We need to find The work done in…

Q: a closed system contained a copper block of density 9.96g/cm3 at 25 degrees celsius in reversible…

A:

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.