A Steel Flywheel in the Form of a Solid Disk $0.1 \mathrm {~m}$

question 11

Essay

A steel flywheel in the form of a solid disk has a radius of 0.2 m and a thickness of $0.1 \mathrm {~m}$ .
(a) What is the maximum rotational frequency that is compatible with the material characteristics of this flywheel?
(b) What is its energy storage capacity at maximum rotational frequency?
(c) If the flywheel is energized by a motor with a power output of $1 \mathrm {~kW}$ (at $100 \%$ efficiency) how long would it take to increase the rotational frequency from zero to the maximum?

Identify different online business models and their characteristics.

Recognize the evolution and strategic moves of major retailers like Walmart in the digital era.

Understand the role of policy and regulation on online business practices.

Distinguish between procurement and purchasing in the digital marketplace.

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Definitions:

Reinforcement

A process in behavior analysis that increases the likelihood of a behavior being repeated by applying a rewarding stimulus or removing a negative one.

Cognitive-behavioral Theorists

Psychologists who emphasize the role of thought patterns and beliefs in influencing behavior and emotions, often proposing therapy approaches to modify these.

Social Anxiety Disorder

A chronic mental health condition in which social interactions cause irrational anxiety and fear.

Beliefs

Convictions or acceptances that something exists or is true, especially without proof, shaping an individual's perception and actions.