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Free_Kalibri [48]
3 years ago
6

Question 2 (Multiple Choice Worth 3 points)

Physics
1 answer:
zmey [24]3 years ago
7 0
Surveys are considered the most reliable way to gather data
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Answer:

ok

Explanation:

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What is the study of sound waves called?<br><br> short answer pls
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Acoustics

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Which describes a p-type semiconductor?
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It has holes (an electron deficiency).
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In designing subway trains and stations, engineers want to optimize the time and energy use between stations. A train can comfor
lukranit [14]

Answer:

Explanation:

Let the time required for acceleration a₁ and deceleration a₂ be t₁ and t₂ .

Since final velocity during acceleration and initial velocity during deceleration are same

a₁ t₁ = a₂ t₂

5t₁ = 2 t₂ ------------------------------------------ ( 1 )

Distance travelled during acceleration = 1/2 a₁t₁²

= 1/2 x 5 x t₁² = 2.5 t₁²

Distance travelled during deceleration = 1/2 a₂t₂²

= 1/2 x 2 x t₂² = t₂²

Total distance travelled = 2 miles = 2 x 1760 x 3 ft = 10560

2.5 t₁² + t₂² = 10560

2.5 ( 2t₂ / 5  )² + t₂² = 10560

.4 t₂² + t₂² = 10560

1.4 t₂² = 10560

t₂ = 86.85 s

t₁ = 2t₂ / 5 = 34.75 s

t₁ + t₂ = 121.6 = 122 s

Total time taken = 122 s .

maximum velocity = a₁t₁

= 5 x 34.75 = 173.75 = 174 m/s .

4 0
3 years ago
Which describes the greatest amount of ice cream?
solmaris [256]

We must know that the gravity acceleration on Jupyter is g = 24.79 m/s² , on the Earth g = 9.8 m/s² and on the moon 1.62 m/s².

The weigh of an object is given by:

P = mg

Solving for m:

m = P/g

We see that for the same weight, if gravity is less, then the amount of mass is greater, because they are inversely proportional. So we conclude that the answer is:

<h2>a 3-N bowl of ice cream on the moon </h2>
8 0
3 years ago
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