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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?
Assume the velocity distribution in the gap is linear, and the area of the block in contact with the oil is 0.25 m2. What is the possible identity of the liquid if the temperature is 20°C?
If the relationship between pressure and volume during the compression is pV = constant, determine the volume, in liters, at a pressure of 3 bar. Also, plot the overall process on a graph of pressur
A centrifugal pump, weighing 600 N and operationg at 1000 rpm, is mounted on six springs of stiffness 6000 N/m each. Find the maximum permissible pump unbalance in order to limit the steady state defl
Both small pipes have the same length and pressure drop. If all flows are turbulent, at ReD near 104, estimate the diameter of the smaller pipe.
The temperature T is constant. Derive an expression using any or all of the specified variables for the new pressure-gauge reading p1 at the top of the cylinder.
The substance comes from the stored energy of the remaining deodorant. How many degrees does the temperature of this remaining substance drop when 1 oz is sprayed?
Determine the rate of mass storage inside the container. Now consider the same problem, except that heat is supplied continuously to the container, maintaining the contents at 40C.
Determine the velocity of the particle as a function of its position s. Evaluate your expression for s=5m if k=0.1m^-1s^-2 and the initial conditions at time t=0 are s(initial)=3m and v(initial)=10m
Three grams of air are contained in a piston-cylinder. Initially, the air temperature and volume are 300K and 2.5 liter. What properties define the second state?
Although the device could be a heat exchanger, we are interested in finding the minimum possible T2. Therefore, treat the process in the device as reversible and find T2 as a function of T1 and To (
Derive the following relationships using the differential equation governing hydrostatic pressure in a fluid. Pressure variation with altitude, Density variation with altitude, and Temperature varia
What is the longest beam you can make that does not yield while supporting only its own weight. Assume that shear stresses on the cross section are negligible compared to (normal) stresses due to b
Plot a graph representing heat flux through the window as a function of window material conductivity for the range of 0.01W/mK<k<100W/mK. Use a log scale where appropriate