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loris [4]
3 years ago
9

Sonar signals and infrared light are are used to send messages to submarines deep under water. If we compare the two signals, wh

ich statement describes a difference between the two?
Physics
1 answer:
WARRIOR [948]3 years ago
6 0
What are the statement choices?
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Three-fourths of the area of a rectangular lawn 30 feet wide by 40 feet long is to be enclosed by a rectangular fence. If the en
satela [25.4K]

Answer:

The fence is 5feet less.

Explanation:

We need to determine

The less amount of fence required, if the enclosure has full width and reduced length, compared to full length and reduced width.

Approach & WorkingArea of lawn = 30 × 403/4th of the area of lawn = ¾(30 × 40) = 30 * 30

 When full width will be fenced, and reduced length will be fenced.

Width = 30 feet30 * L = 30 * 30Hence, length = 30 feetLength of fence needed = 2(30 + 30) = 120 feet

When full length will be fenced, and reduced width will be fenced

Length = 40 feet40 * W = 30 * 30W = 22.5 feetLength of fence needed = 2(40 + 22.5) = 125 feet

Difference in length of fence needed = 125 – 120 = 5 feet.

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3 years ago
Three small children of mas 20.0 kg, 24.0 kg, and 16.0 kg, respectively, hold hands, as
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3 years ago
2. Sara y Antonio son mellizos. Cuando nacieron, Sara pesaba 600 gramos más que Antonio. Sus pesos ya se han igualado, gracias a
valkas [14]

Answer:

8,25 creo

Explanation:

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3 years ago
How many stars are there in an Open Cluster?*
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Very few

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3 years ago
17. Which of the following is NOT a testable
Artemon [7]

Answer:

c. testing student opinions

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opinions aren't factual and they would not aide an experiment if it wasn't for a social experiment.

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