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3 years ago

PLEASE HELP

2 answers:

8 0

PLEASE HELP
NASA scientists have determined that the chance a single person would get hit by a piece of falling satellite is one in 3,200. What can you infer based on this probability?

A. Satellites that enter Earth’s atmosphere land mostly in the ocean.

B. NASA does a good job informing people of when satellites will enter the atmosphere.

C. Satellites that enter Earth’s atmosphere land mostly in unpopulated areas.

D. Much of a satellite is destroyed during the process of entering Earth’s atmosphere.

dybincka [34]3 years ago

5 0

Answer:

The Answer Is Much of a satellite is destroyed during the process of entering Earth’s atmosphere.

Explanation:

Right On Edge

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2 years ago

A cylindrical specimen of this alloy 12 mm in diameter and 188 mm long is to be pulled in tension. Assume a value of 0.34 for Po

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This question is incomplete, the missing image in uploaded along this answer below.

Answer:

The required stress is 200 Mpa

Explanation:

Given the data in the question;

diameter D = 12 mm = 12 × 10⁻³ m

Length L = 188 mm = 188 × 10⁻³ m

Poisson's ratio v = 0.34

Reduction in diameter Δd = 0.0105 mm = 0.0105 × 10⁻³ m

The transverse strain will;

εˣ = Δd / D

εˣ = -0.0105 × 10⁻³ / 12 × 10⁻³ m

εˣ = -0.00088

The longitudinal strain will be;

$E^z$ = - ( εˣ / v )

$E^z$ = - ( -0.00088 / 0.34 )

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Now, Using the values for strain, we get the value of stress from the graph provided in the question, ( first image uploaded below.

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The stress is 200 Mpa

Therefore, The required stress is 200 Mpa

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2 years ago