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Lorico [155]
2 years ago
8

You drive 3.4 km in a straight line in a direction 6.9º east of north. If an alternate route to this same destination takes you

straight east and then turns directly north to arrive at the same point, find the distance you would have to drive north.
Physics
1 answer:
Scrat [10]2 years ago
3 0

Answer:

You would have to drive in north direction 0.41km

Explanation:

We can solve this with trigonometry, We know that:

sin(\alpha )=\frac{opposite}{hypotenuse}\\where: \\opposite=north\\hypotenuse=distance

North=sin(6.9^o)*3.4km=0.41km

So the distance I will have to drive in north direction is 0.41km

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Answer:

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2 years ago
What total mass must be converted into energy
Eduardwww [97]

This question apparently wants you to get comfortable
with  E = m c² .  But I must say, this question is a lame
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c = 3 x 10⁸ m/s
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                           1.03 x 10⁻¹³ joule  =  (m) (3 x 10⁸ m/s)²

Divide each side by (3 x 10⁸ m/s)²:

                         Mass = (1.03 x 10⁻¹³ joule) / (9 x 10¹⁶ m²/s²)

                                   =  (1.03 / 9) x (10⁻¹³ ⁻ ¹⁶) (kg)

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______________________________________

Something like this could have been much more impressive:
 
The Braidwood Nuclear Power Generating Station in northeastern
Ilinois USA serves Chicago and northern Illinois with electricity.
<span>The station has two pressurized water reactors, which can generate
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Energy = (2,242 x 10⁶ joule/sec) x (86,400 sec/day) x (365 da/yr)

             =  (2,242 x 10⁶ x 86,400 x 365) joules

             =          7.0704 x 10¹⁶ joules .

How much converted mass is that ?

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Divide each side by  c² :    Mass  =  E / c² .
c = 3 x 10⁸ m/s

              Mass = (7.0704 x 10¹⁶ joules) / (9 x 10¹⁶ m²/s²)

                        =        0.786 kilogram ! ! !

THAT should impress us !  If I've done the arithmetic correctly,
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7 0
3 years ago
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7 0
3 years ago
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