Author Archives: Yu-Tzu Chang

Write and respond 2

Throughout this semester, we have discussed so many different topics and models including climate change, water conservation, and energy; moreover, different ways to approach those topics. My initial assumption toward this class is that it will be the same with … Continue reading

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Alaska’s permafrost is thawing

Everybody knows global warming, but the arctic is warming twice as fast as other parts of the planet; high sea levels threaten coastal native residents, and moreover, sea ice and wildlife habitat are disappearing. Climate change is bringing tremendous harm … Continue reading

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Dishwasher v.s. Hand washing

Water is considering one of the most important resources to support human live. We can’t live without it. When I was young, I always help my grandmother do house chores such as wash dishes, but with the advancement of technology, … Continue reading

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In the News post: Monk Parakeet Invasion of Mexico Driven by Europe’s Ban on birds imports

In many cases, it is common for people to neglected the small part of things because we thought it is unimportant, or it won’t make many differences; however, this article from Scienticfic American talks about how the monk parakeet’s invasion in … Continue reading

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Yu-Tzu, Chang: math quiz

1.\(x^3-3x^2-10x=0\) 2.\((1+r)^n\) 3. \((5.7\times 10^{-8})\times (1.6\times 10^{12})=9.12\times 10^4\) 4. \(\pi L(1-\alpha) R^2=4\pi\sigma T^4R^2\) 5.\(12km\times\frac{0.6mile}{1km}\approx 7.2mile\) \[12km\times\frac{0.6mile}{1km}\approx 7.2mile\] 6. \(4,173,445,346.50\approx 4,200,000,000=4.2\times 10^9\) 7. \[50m\times\frac{3.4\times 10^6 kg}{1 sec}\times\frac{10J}{1kg\cdot 1m}=1.7GW\] 8.  \($5000\times (1+0.012)^{30}\approx $7,150\)    

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Introduction-Yu-Tzu, Chang

Hi everyone:) My name is Rachel Chang(and my Chinese name is Yu-Tzu, Chang ) I am from Taiwan , and this is my first year in Penn State, so apparently I am a freshmen. I am actually not a math … Continue reading

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