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If we remove both the forces of drag and buoyancy the moment the tip of the tree breaks the surface, how high will the tree y? What is a better way to treat the buoyancy force near the surface?
A body is acted upon by an upward force of 12N and a horizontal force of 20N to the right. What are the amount and the direction of the resultant?
The greatest fluctuation of energy to be stored by an engine flywheel is 2kJ when the mean engine speed is 4 rev/s. The speed variation is to be limited to ?1% and the mass of the flywheel is 450kg.
If the speed variation from max to min is not to exceed 0.2 rev/s and the greatest fluctuation in energy during the punching and idling strokes is 7kJ, find the moment of inertia of the flywheel [4
If the plate is held at 30C, determine the average heat transfer per unit width, assuming that the critical Reynolds number, Re = 500,000.
The maximum discharge is 3,000 CFS when the head on the crest of the spillway is 5 feet. Using a model scale of 1:10, calculate head of the crest of the model for the maximum discharge (in inches).
A water stream is heated in fully developed flow through a pipe with uniform heat flux at the wall. The flow rate is m=10g/s, the heat flux q"=0.1 W/cm2, and the pipe radius r0=1cm.
Derive an expression for the water level height h(t) as a function of time and determine the time it takes to drain. Assume the flow is incompressible and inviscid (i.e. use bernoulli).
The density if water at sixty degrees Fahrenheit and atmospheric pressure is sixty-two point four lbm/ft^3. What is the specific weight of this water? NOTE: Gravity = 31.6 f/s^2
Does this flow satisfy the continuity equation. Find the pressure gradient, (nabla)p(r,theta,z), by assuming a frictionless flow and neglecting gravity.
Determine the time dependent temperature distribution in the fluid in the immediate vicinity of the wall for t>t1. Note that the temperature does not change along the plate; it is only changes wi
Steam enters an adiabatic turbine at 10 MPa and 500 °C and leaves at 10 kPA with a quality of 90%. Neglecting potential, kinetic and potential energy effects determine the mass flow rate requir
Consider fully developed laminar flow between parallel plate. The heat flux through the walls of the chanel is uniform. Derive the analytical expresion for the fully developed temperature profile, a
An inverted conical container, 26 in in diameter and 44 in high, is filled with a liquid at 20degreesC. The liquid weight is 5030 onces. What is the density of the fluid, in kg/m3?
What other factors other than 'protection potential' need to be taken into account when selecting a sacrificial anode material for a steel ocean going vessel?
For steady-state operation, and ignoring heat transfer for the two turbine stages and any effects of kinetic and potential energy, determine the following mass flow rate of the steam (kg/h).
An axial piston pump delivers 0.002 m3/s at 3300 rpm. It has nine 16-mm diameter pistons arranged on a 135-mm piston circle diameter. Calculate the offset angle for the pump if the volumetric effici
Assuming ideal-gas behavior for air, steady flow, and negligible effects of kinetic and potential energy determine the power input (kW) to the compressor.
A subway train with cars A, B and C is traveling at 66ft/s when the brakes are applied on cars A and B causing them to slide on the. No brakes on car C. The coefficient of friction is .30 between th
What is the rate of entropy generation in the turbine when steam enters an adiabatic turbine at 8Mpa and 500oC at a rate of 18kg/s, and exits at 0.2Mpa and 300oC.
Determine the maximum sustainable torque that the solid shaft can handle. Determine the maximum sustainable torque that the tubular shaft can handle.
A string is attached to the drum (radius r) of a spool (radius R) as shown in side and end views here. (A spool is device for storing string, thread etc.) A tension T is applied to the string at ang
The room temperature yield strength of Ni is 100MPa (15,000 psi) and, furthermore, sy diminishes about 5MPa for every 50 degree celsius rise in temperature.