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A spherical balloon with a diameter of 6 m is filled with helium at 20°C and 200 kPa (absolute). Determine the number of moles of helium and the mass of the helium in the balloon.
Estimate the max. force required for extruding a cylindrical Al billet of 50mm dia and 75 cm long to a final dfiamter of 10 mm. The average tensile yield stress for Al is 170N/mm2.
If the body is released downward from rest at a very high altitude determine the velocity when t=3. Determine the bodys terminal or maximum attainable velocity as ( t goes to infinity).
Determine the magnitude of P if 10 s is required for the package to travel 5 m up the incline. The static and kinetic coefficients of friction between the package and the incline are both equal to 0
Convection coefficient 100 W/m2.K. for both surfaces. If the heater dissipates 10 kW/m² under normal conditions, what is the temperature of the lower plate surface?
A 10-kg mass of R-134a at 1.2 MPA and 70 C is cooled at constant pressure until it reaches a temperature of 20 C. Determine the states at points 1 and 2. Show the process on a T-v diagram with respect
Solution the slider a has a mass of 2kg and moves in a slot in a vertical sliding plate. (i) what horizontal acceleration a should be given to the plate so that the absolute acceleration of the sli
Calculate the heat loss through L=10 mm- thick polycarbonate, soda lime glass, and aerogel windows, respectively. The thermal conductivity of the aerogel and polycarbonate.
If the motorcycle accelerates at 6 ft/s^2 until reaching a velocity of 85 ft/s. How long will it take for him to get 100ft in front of the truck if he starts 40 ft behind the truck and the truck len
A turbine receives 0.1 kg/s of hot air at 55 m/s velocity at 1.4MPa and 900K. The air leaves at 225m/s and 200 KPa and 500K. If the turbine loses heat at a rate of 50KJ/g. Determine the power output
The amount by which the first liquid will fall on the right-hand leg. If density1 is known but density2 is unknown, could the apparatus be used for determing the density of the second liquid?
Water with a density of 62.4 lbm/ft3 enters a 36" diameter cylindrical container at 85 gpm. How much water will exit the tank during this filling process?
Design the machine mounts consisting of a linear spring and a viscous damping device with damping factor of 0.2, so that only 20% of the dynamic force is transmitted to the base of the support.
Calculate the tension in the rope, in Newtons, when you lift your friend to safety. If the rope can withstand 1.25 kN of stress per square centimeter of cross-sectional area.
If the pipe is to be insulated with glass wool insulation (k=0.05 W/m*K) in order to decrease the temperature rise of water to 0.25 deg. Celsius, determine the required thickness of insulation.
A hydraulic jack has a load piston diameter of 150 mm, and a plunger diameter of 25 mm. Ignoring losses, what force will be needed on the plunger to raise a load of 2500 kg?
Also, when t= 0, carB located 6000 ft down the road is traveling towards at a constant speed of 60 ft/s. Determine the distance traveled by car A when they pass each other?
The changes in specific internal energy for the two expansions are u2-u1=-50kJ/kg, and u3-u2=-15kJ/kg. Find p1,p2,p3(in bar), work of the fluid from 1 to 2(in kJ), and the net heat transfer from 1 t
When the balloon reaches an altitude where is is neutrally buoyant, it transmits information about weather conditions to monitoring stations on the ground. Is this Lagrangian or an Eulerian measurem
Determine the velocity of the particle as a function of time. When t=0 ,v=0 , and s= 15 ? Determine the position of the particle as a function of time?
Refrigerant 134a is throttled from a saturated liquid at 70F to a saturated liquid-vapor mixture at 36.1 psia. What are the temperature drop, quality, and specific volume at the end of the throttli
Determine the net work of the cycle, in kJ, and the heat transfer process from 2-3, in kJ. Is this a power cycle or a refrigeration cycle? Explain.
A particle travels along the circular path x2 + y2 = r2. If the y component of the particle's velocity is vy = 2r cos 2t, determine the x and y components of its acceleration at any instant.
Determine the distance the cart will move down the inclined surface before reversing direction. B) find the velocity of the cart when it returns to the point of release.
What torque must be applied to the shaft to overcome the fluid shear stress to maintain this rotational speed? What power (in W) would be required to maintain this speed?