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What natural frequency must a hand drill have if its vibration must be limited to a minimum rms displacement of 10 μm and rms acceleration of 0.1 m/s2 ? What rms velocity will the drill have?
Determine the maximum temperature in the rod and the heat flow rate at each end. Check your results by comparing the net heat flow rate at the two ends with the total rate of heat generation.
A commercial refrigerator with refrigerant- 134a as the working fluid is used to keep the refrigerated space at 235°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.25 kg/ s and leaves at 26°C.
a gas turbine engine based on the brayton cycle uses air as the working fluid that produces 5mw net power output. the
The 20 kg block is falling and when it is 7.5 m from the gravel surface it has a velocity of 2.5 m/s. Determine the velocity of the block the instant it hits the gravel surface using
A 2.64 kg copper part, initially at 400 K, is plunged into a tank containing 4 kg of liquid water, initially at 300 K. The copper part and water can be modeled as incompressible with specific heats of 0.385 kJ/kg. K and 4.2 kJ/kg.K, respectively. For..
consider the annulus formed between a rod of radius r0 and a tube of radius r1. find the velocity profile for couette
the piston of a piston-cylinder device containing gas has a mass of 60kg and a cross-section area of 0.04m. the local atmospheric pressure is 0.97bar, and the gravitational acceleration is 9.81ms. determine the pressure inside the cylinder?
The microstructure of a copper-silver alloy at 775°C (1425°F) consists of primary and eutectic structures. If the mass fractions of these two micro constituents are 0.75 and 0.25, respectively, determine the composition of the alloy (expressed in wt...
A closed rigid, well-insulated tank contains 2 kg of saturated mixture of water at 159kPa. Initially, three-quarters of the mass in the tank is saturated liquid. An electric resistance heater placed in the tank is connected to a 11-V source and curre..
a temperature measuring devise has been used to measure a dynamic temperature change in a system. the system is no
the motion of the slender 10kg rod AB is guided by collars of negligible mass that slide freely on the vertical and horizontal rods. knowing that the bar is released from rest when θ=30, determine the velocity of the collars A and B when θ = 60.
The outside wall of a refrigerated storage room is 10m long and 3m high and is constructed with 100-mm concrete blocks ( k=0.935W/m C) and 10 cm of fiber insulation board (k=0.048W/m
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