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zhannawk [14.2K]
3 years ago
12

Jonah finds a rusty nail outside. The nail is an example of _____.

Physics
2 answers:
Aleonysh [2.5K]3 years ago
7 0

Answer: Option (A) is the correct answer.

Explanation:

When metal is corroded due to moist air then this process is known as rusting of iron.  

When a nail rusts then it represents that metal has turned into metal oxide. This means that chemical composition of substance has changed.

Thus, we can conclude that Jonah finds a rusty nail outside. The nail is an example of chemical weathering.

Pani-rosa [81]3 years ago
3 0
I believe the correct answer from the choices listed above is option A. Jonah finds a rusty nail outside. The nail is an example of <span>chemical weathering. Rusting of nail is a result of reaction of iron with water in air. Hope this answers the question. Have a nice day.</span>
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Show that the optimal launch angle for a projectile subject to gravity is 45o by carrying out the following steps: 6. Write down
Lorico [155]

Answer:

sin  2θ = 1    θ=45

Explanation:

They ask us to prove that the optimal launch angle is 45º, for this by reviewing the parabolic launch equations we have the scope equation

            R = Vo² sin 2θ / g

Where R is the horizontal range, Vo is the initial velocity, g the acceleration of gravity and θ the launch angle. From this equation we see that the sine function is maximum 2θ = 90 since sin 90 = 1 which implies that θ = 45º; This proves that this is the optimum angle to have the maximum range.

We calculate the distance traveled for different angle

          R = vo² Sin (2 15) /9.8

          R = Vo² 0.051 m

In the table are all values ​​in two ways

Angle (θ)                  distance R (x)

 0                 0                     0

15                 0.051 Vo²        0.5 Vo²/g

30                0.088 vo²        0.866   Vo²/g

45                0.102 Vo²        1   Vo²/g

60                0.088 Vo²      0.866   Vo²/g

75                0.051 vo²        0.5   Vo²/g

90                0                     0

See graphic ( R Vs θ)  in the attached ¡, it can be done with any program, for example EXCEL

6 0
2 years ago
If you double the distance between you and the center of Earth, what happens to the strength of the gravitational field you expe
Lostsunrise [7]

Answer:

The strength of gravity decreases.

An example of that would be if you were in space; you float around because there's no gravity.

7 0
3 years ago
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Naily [24]

Answer:

The answer is A good luck :P

8 0
3 years ago
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valina [46]

Answer:

s^ -1    ( or    1/sec)

Explanation:

Velocity is given in units of displacement / sec

like feet /sec   or   m/sec    

so b would have units of   s^-1

(or perhaps a more general term would be   time^-1)

8 0
1 year ago
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3 years ago
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