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3 years ago

3 QUESTIONS FOR 40 POINTS!! Will mark brainliest!!

Advanced Placement (AP)

1 answer:

Ann [662]3 years ago

4 0

Answer:

1.) How do solar thermal generators work?

D.) They use solar cells to covert sunlight directly into electricity

2.) Fossil fuel dependence has an impact on which of the following?

A.) the environment

3.) How much money does the United States lose each year due to the non-local resource trade deficit?

D.) 300 billion

Explanation:

In solar thermal generators. they depends solely on sun's energy for its energy generation and distribution. <em>The energy generation made use of solar cells which are cells joined together in series which helps in trapping the sun's energy and converting them into electric charges for its onward transmission to the circuit and battery leading to electricity. </em>

On the other-hand, over dependence on fossil fuel causes environmental issues like global warming due to gas flaring etc.

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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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