Find stiffness of spring so that period of free vibration
The governing equation for a simple mass-spring system exemplified in class is:
m? + kx = 0
If m = 2.0 kg, determine the stiffness of the spring so that the period of the free vibration of the system is half a second.
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Determine the carburizing time necessary to achieve a carbonconcentration of 0.45 wt% at a position 2 mm into an iron-carbonalloy that initially contains 0.20 wt% C. The surface concentrationis to be maintained at 1.30 wt% C, and the treatment is
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When these forces begin to act, the velocity of the duck is 0.11 m/s in a direction due east. Find the magnitude and direction (relative to due east) of the displacement that the duck undergoes in 2.2 s while the forces are acting.
Suppose a researcher gathered survey data from 19 employees and asked the employees to rate their job satisfaction on a scale from 0 to 100 (with 100 being perfectly satisfied). Suppose the following data represent the results of this survey.
Two small plastic spheres are given positive electrical charges. When they are a distance of 14.2 cm apart, the repulsive force between them has a magnitude of 0.210 N. What is the charge on each sphere if the two charges are equal?
In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol (in
Determine the molecular formula for ibuprofen, a common headache remedy. Analysis ofibuprofen yields a molae mass of 206 g/mol and a percentcomposition of 75.7% C, 8.80% H and 15.5% O
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