EALL 200 Lecture 11: Is an A

Assume XYZ Corp. had a current ratio of 12.5 You are the CFO of XYZ Corp. Would you argue the high current ratio is good or bad? Why?

Ratios provide us with the ability to quickly assess a particular item. We can quickly assess short-term liquidity by looking at a firm's current ratio. We can quickly assess a firms capital structure by looking at a firm's debt to equity ratio. So ratios provide excellent and quick information. That said, why would relying on one ratio likely lead to an inaccurate conclusion about a particular company?

A reflex is an unconscious action in response to some specificstimulus, e.g., blinking an eye, or pulling the hand away from ahot pin

I know from school biology, and reading online that withdrawalreflexes are quick because

• CNS is involved
• Danger receptors send impulses to prevent inhibition offlexion

When a person is extremely obese, do these flexion impulses takelonger?

Is a withdrawal reflex in an obese person noticeably slower thanin case of a reasonably fit person?

For each of the following material properties, mark whether metals or ceramics would typically have a higher value (mark both if its not clear).

Ceramics Metals

Maximum Tensile Strength (Ideal) _______ ______

Maximum Tensile Strength (in practice) _______ ______

Elastic Modulus _______ ______

Ductility _______ ______

Thermal Conductivity _______ ______

Corrosion Resistance _______ ______

Impact Toughness _______ ______

Scratch Resistance _______ ______

Ease of Manufacture _______ ______

Cost _______ ______

Prove the minimum ratio of the ionic radii in an octahedral pair (coordination # = 6) is 0.414. (Hint: Draw a picture of what a coordination number = 6 would look like)

Describe the difference in the atomic behaviors (specifically viscosity) of crystalline and amorphous ceramics as they heat up.

Determine the coordination number for the following pairs:

MgO

Al₂S₃

BaO

NiS

Which of the following is not an advantage of powder sintering

Faster processing

Ease of final shape processing

High Strength

Lower temperature/energy requirements

Assume you make a semi-conductor out of germanium, and dope it with nitrogen. What type of semi-conductor is the result?

N-Type -or- P-Type

Match the form of carbon to its description