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lisov135 [29]
4 years ago
10

Zhuang is trying to decide which major he should choose in college. His older brother notes that Zhuang is always asking questio

ns, so maybe he should become a scientist. If Zhuang asks the same kinds of questions that successful scientists ask, he is probably asking things like
A) Why? How do you know? Where's your evidence? Is there another explanation?
B) How does this affect me? Why is it important that I know this?
C) Where will I use this information? Will it help me get ahead in life?
D) Who? What? When? Where? How? Can I get a quote?
Advanced Placement (AP)
1 answer:
saveliy_v [14]4 years ago
5 0
Pretty sure the answer is A
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An aircraft is climbing at a 30 degree angle to the horizontal. How fast is the aircraft gaining altitude if it's speed is 500 m
denis-greek [22]

Answer:

The aircraft is gaining altitude at 250\frac{mi}{h}

Explanation:

Draw a vector diagram. (Right angle triangle speed as the hypotenuse)

Let

x -----> horizontal component of the speed

y ----> vertical component of the speed

s ----> speed in miles per hour

we know that

x=cos(30\°)(s)

y=sin(30\°)(s)

we have

s=500\ \frac{mi}{h}

cos(30\°)=\frac{\sqrt{3}}{2}

sin(30\°)=\frac{1}{2}

substitute

x=\frac{\sqrt{3}}{2}(500)

x=250\sqrt{3}\frac{mi}{h}

y=\frac{1}{2}(500)

y=250\frac{mi}{h}

therefore

The aircraft is gaining altitude at 250\frac{mi}{h}

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