Does the slope of the stress-strain diagram relate to any property of the material? Explain.
What will be an ideal response?
The slope of the stress-strain diagram indicates the modulus of elasticity of the material. The greater the slope, the
higher the modulus of elasticity.
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An insurance company is interested in the relationship between the number of licensed vehicles in a state and the number of accidents per year in that state. It collects a random sample of 10 counties within the state:
 FIGURE 1.png)
(a) Plot the points on linear graph paper.
(b) Find the equation that relates X and Y.
(c) Find the correlation coefficient.
(d) Estimate from the derived equation the number of accidents in the largest county, with 35 000 vehicles.
Write the equations used to calculate range.
What will be an ideal response?
A ____ reacts to stop, start, or modulate the flow of water, air, or refrigerant to the system or conditioned space
A. sensor B. controller C. controlled device D. none of the above
Two moles of helium, which you can model as an ideal gas with Cv*= (3/2)R, is confined in a rigid vessel (constant volume) that is sealed and has no interior moving parts. Initially, the gas has P=1 atm and T=300 K. If 1000 Joules of heat are added to the vessel, determine:
A) The amount of work added to, or removed from, the helium. B) The final temperature of the helium. C) The change in entropy of the helium. (If you have no answer to part B, assume the final temperature is T=400 K).