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The coefficient of static friction between the coin and the turntable is .200. The speed is slowly increased. At what speed (in rpm) does the coin start to slip?
Analyze the process assuming condenser pressures of 1) 80 bar, 2) 100 bar, and 3) 150 bar. Draw all three processes on the PH diagram, and present PTHS tables for each process.
What is the maximum height reached by the rocket? B) how long after lift-off does the rocket reach its maximum height? c) How long is the rocket in the air?
Assume that person's brain is 1.81 m from his toe and that the impulses travel directly from toe to brain. If a person stubs his toe, find the time for the impulse for touch to reach his brain.
During the 5.0 s interval immediately after braking begins, the speed decreases to 13 m/s. What distance does the motorcycle travel from the instant braking begins until the motorcycle stops?
Derive general expressions for (a) the horizontal range of the projectile between nth and n+1th collision and (b) the time interval between the nth and n+1th collision.
The 20 kg mass is released from the position shown and falls on the linear spring (k = 30000 N/m). Use conservation of energy to determine how far down the mass moves after contacting the spring.
Calculate the cycle thermal efficiency and the net work per lbm of steam. You must draw a clearly labeled schematic and a corresponding T-s diagram.
Two charges, -18 C and +4.9 C, are fixed in place and separated by 4.2 m. (a) At what spot along a line through the charges is the net electric field zero?
Calculate the cycle thermal efficiency and the moisture content of the steam leaving the turbine for turbine inlet temperatures of saturated vapor, 700 F, 1000 F.
Choosing the helium to be your system, determine the work and heat transfer (kJ/kg) for each process in the cycle. Determine the thermal (first-law) efficiency of this cycle.
The upper block just begins to slip when the amplitude is increased to 32cm. What is the coefficient of static friction between the two blocks?
re. For a specified quanity of heat transfer to the system, determine the final temperature given that it is a constant pressure process.
If the surroundings are at 30 C and the flow is steady, find (a) the rate of heat transfer from the turbine (b) the rate of entropy production by the steam.
Carry out a simple thermodynamic analysis of this process: find the operating pressures in the evaporator and condenser, sketch the cycle on a PH diagram, find the heat flows QH and QL and work done
The loading produes a gross nominal tension stress of 45 MPa perpendicular to the plane of the crack tip. Calculate the stress intensity factor at the crack tip.
What tensile yeild strength is required to provide a safety factor of 2.5 with respect to initial yeilding According to maximum-shear-stress theory?
A car drives over the top of a hill that has a radius of curvature of 100 ft. Determine the maximum constant speed V at which the car can go over the hill.
Determine the velocity at the exit of this engine's nozzle and the thrust produced. Assume ideal operation for all components and constant specific heats at room temperature.
The minimum and maximum temperatures in the engine are 290 K and 1400 K, respectively. On the basis of an air standard analysis, assuming Brayton cycle for the operation of the engine, determine:(a
An electric motor has a rotor with a mass moment of inertia of 30 ft-lb-s^2. What torque is required to accelerate it from rest to 1160 rpm in 1.5 seconds?
A 50-lb sphere with a radius of qyration of 0.4 ft is accelerated about its centroidal axis. Determine the torque (moment) required to accelerate it from rest to 800 rpm in 15 seconds.
Find: (a) Healt flux required in heating section to ensure a maximum mean product temperature of Tm=90C (b) Location and value of the maximum local product temperature.
Calculate the acceleration (in m/s^2) with which the iron ball sinks before reaching its terminal velocity. g = 10 m/s^2. Type your answer in m/s^2, to the second decimal place.
It is decided to provide a lateral bracing in all directions for the column at its mid-length. Determine the critical buckling load for the redesigned column.