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Starting from rest the motorboat travels around the circular path,P = 50m , at a speed v=(0.8t)m/s, where t is in seconds. Determine the magnitude of the boat's velocity when it has traveled 40m.
A cylindrical bar of aluminum 19 mm (0.75 in) in diameter is to be deformed elastically by application of a force along the bar axis. Using E=10 psi (Modulus of Elasticity), determine the force that w
A gas turbine Brayton cycle operates with an intercooler a re-heater and a regenerator. Air enters the engine at 14 psi and 60 °F; the pressure ratio for each stage of compression is 3.
The block B is suspended from a cable that is attached to the block at E, wraps around three pulleys, and is tied to the back of a truck. If the truck starts from rest when xD is zero, and moves forwa
A heat exchanger is to be designed to condense 1100 kg/hr of steam ay 150 kPa. For this purpose, cooling water at 50 degrees celsius is available in sufficient quantity to accomplish the cooling.
To what temperature would a constrained rod of aluminium with a diameter of 50 mm need to be heated if it is expected to exert a force of 200 kN? Take the initial temperature to be 20 °C and the Y
Determine the torque that can be applied to a solid shaft of 20-mm diameter without exceeding an allowable shearing stress of 80 MPa.
A strip of metal is 250 mm long. It is stretched in two steps, first to 300 mm and then to 400 mm. Show that the total true strain is the sum of two true strains in each step, that is, tha
A 40 mm diameter hole is drilled 3 m deep into the steel shaft. When the two torque are applied, determine (a) the maximum shear stress in the shaft.
Two kilograms of Refrigerant134a, initially at 2 bar and occupying a volume of 0.12 m3, undergoes a process at constant pressure until the volume has doubled. Kinetic and potential energy effects are
The wheel in Fig. 10-27 has eight equally spaced spokes and a radius of 30 cm. It is mounted on a fixed axle and is spinning at 2.5 rev/s.
An air conditioner in the airport of Timbuktu runs a cooling system using R-410a with a high pressure of 1500 kPa and a low pressure of 200 kPa. It should cool the desert air at 45 degrees C down to 1
A 75-lb stoplight is suspended between two poles as shown in fig p3-27. Neglect the weight of the flexible cables and plot the tension in both cables as a function of the sag distance d(0<
Convert the composition of the following alloy from atom percent to weight percent (a) 44.8 at% of silver, (b) 46.3 at% of gold, and (c) 8.9 at% of Cu. Assume that the atomic weights for silver, gold
A 10-lb block is attached to an unstretched spring of constant k=12lb/in. The coefficients of static and kinetic friction between the block and the plane are 0.60 and 0.40, respectively.
A stone is dropped into a lake causing circular waves whos radii increase at a contant rate of .5 m/s at what rate is the circumference of a wave changing when its radius is 4 meters?
A 250 mm bar of 15mm x 30 mm rectangular cross-section consists of two aluminum layers, which are 5 mm thick each, brazed to a center brass layer of the same thickness.
A stationary gas turbine power plant operates on a simple ideal Brayton cycle with air as the working fluid. The air enters the compressor at 95 kPa and 290 K and the turbine at 760 kPa and 1100 K.
A balloon behaves so the pressure is P = C2V1/3, C2 = 100 kPa/m. The balloon is blown up with air from a starting volume of 1 m3 to a volume of 3 m3. Find the final mass of air assuming it is at 25oC
A small, 0.6-lb collar D can slide on portion AB of a rod which is bent as shown. Knowing that r = 8 in and that the rod rotates about the vertical AC at a constant rate of 10 rad/s.
A new containment vessel for nuclear waste is being tested by a group of engineers working for the U.S. Department of Energy. The spherical vessel is made from 50 kg of lead and is pressuriz
The man pulls the boy up to the tree limb by walking backward. If he starts from rest when = 0 and moves backward with a constant acceleration = 0.2 , determine the speed of the boy at the instant = 4
A cylindrical specimen of an aluminum alloy, has a Young's' Modulus of 59GPa, original length of 250mm, length at fracture of 254mm and a 0.2% yield stress of 287MPa.