Value of mass attached to a spring
A mass m at the end of a spring vibrates with a frequency of 0.92 Hz. When an additional 609 g mass is added to m, the frequency is 0.58 Hz. What is the value of m?
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A 1050 hot-rolled steel of diameter 300mm has an ultimate tensile strength of S_ut=724MPa. Determine the un-modified endurance limit of the steel member from a rotating beam test.
Two charges attract each other with a force of 2.5 N. What will be the force if the distance between them is reduced to one-ninth of its original value?
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The combustion of methane gas (CH4) with air leads to the following volumetric analysis of the product gases on a dry basis: 9.52 % CO2, 0.28 % CO and 3.57 % O2. Determine The moles of air used per mole of fuel and the percent excess air used.
A 0.45 kg mass vibrates according to the equation x = 0.49 cos 8.45t, where x is in meters, and t is in seconds. (a) Determine the amplitude. (b) Determine the frequency. (c) Determine the total energy.
Ethane gas is burned in a steady-flow process with 30% excess air, both of which enter separately at 25 0 C and 1 atm. Assume the reaction goes to completion, and the products leave as a mixture at 1 atm and the environmental temperature of 25 0C.
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