Biology, 15.07.2019 16:30 kristenhani

No machine can achieve 100% efficiency in terms of work output. in any mechanical system, what is considered the most common cause for some of the work being turned into thermal energy? a) friction b) inefficiency c) poor design of the machine d) not using the machine properly

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Answer from: 200002977

The answer is A, friction.

Friction is the force that resists movement, and that's why oil is used as a lubricant and why ball bearings are used for machines that need to move with very little friction(i.e. bike wheels, roller skates, fidget spinners)

Answer B is too vague
C will probably reduce efficiency greatly, but not specifically in a way that turns work into thermal energy.
D is the same as C, except that it places the blame on the person using the machine, not the machine itself.

Hope I helped clear it up for you :)

Answer from: meillsss

The answer is A, Friction. The other ones don't make sense

Friction- action of one surface or object rubbing against one another

Hope this helps!

Answer from: Quest

picture a world where computers are building made-to-order personalized robotic arms and synthetic organs, drones are circulating above mars! due to the rapid growth of technology, the future has never been more unpredictable, and it presents a huge challenge in education: we are teaching students how to work in a future that we have never been unsure of. it is widely predicted that in eight years’ time, there will be more jobs in the fields of science, mathematics, technology and engineering than in any other discipline. and, as the technology continues to develop, it will soon become clear that addressing social problems will involve more innovative thinking, and analytical and technical knowledge than ever before. undeniably, there are no subjects that encourage innovative and creative thinking, deep thought, problem solving and independence more than the stem subjects. while it is widely commented on that there is a need to reimagine the ways stem subjects are taught in schools by embracing a more interactive and innovative approach to appeal to more students, it should come as no surprise that some of the most reputable educational organizations in the world are already implementing changes to embrace stem. harvard, for example, announced in 2014 that they were increasing their computer science faculty by over 50% and has since introduced computer science as a core subject for all freshmen. the urgency of supporting stem subjects at a young age is becoming more relevant than ever, as adopting a keen interest in the curricula needs to happen early. however, beyond the age issue is one of gender.

let me know if you need more

Answer from: Quest

whats the drop down answers ?

explanation:

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No machine can achieve 100% efficiency in terms of work output. in any mechanical system, what is co...

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