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kodGreya [7K]
3 years ago
14

When an object is moving away from you while making a sound, the pitch of the sound is perceived to be ___________. lower unchan

ged higher fluctuating
Physics
2 answers:
Len [333]3 years ago
8 0

the answer is higher

allsm [11]3 years ago
6 0

The correct answer is that the pitch seems LOWER

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What would decrease the resistance of wires carrying an electric current?
alisha [4.7K]

Answer:

shorter wires

Explanation:

Resistance, R = ρL / A

where R = Resistance, ρ = constant called Resistivity, L = Length and A = Area,

From the formula, above, the Resistance R would decrease if the length is small.

6 0
3 years ago
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The charge on the square plates of a parallel-plate capacitor is Q. The potential across the plates is maintained with constant
lesantik [10]

Answer:

i)  Q' = Q/2.

ii) If the wires to the battery are disconnected, the amount of charge on the plates remains constant, and the voltage across the plates remains the same.

Explanation:

i) The formula for capacitance is given as

C = A/d                              

Where d = separation between the plates

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Q = CV

Q = AV/d

When "d" is doubled, the charge stored "Q" becomes half because Q is inversely proportional to the separation between the plates, d.

Thus, Q' = Q/2.

ii) If the wires to the battery are disconnected, the amount of charge on the plates remains constant, and the voltage across the plates remains the same.

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4 years ago
Which of the following describes a major role of gravity in star formation?
MrRissso [65]
The ans is B) because gravity attracts and doesn't repel
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4 years ago
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Which of the following must be true of a person who shares the same reference frame as you?
melomori [17]

Answer: c

Explanation:

7 0
3 years ago
A power plant has two types of transformers. The first type of transformer triples voltage and the second type of transformer re
Stella [2.4K]

Answer:

d . 6 times the secondary turns in the second type of transformer

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V₂ / V₁ = n₂/n₁

n₁ and n₂ are no of turns in primary and secondary coil and V₁ and V₂ are voltage in primary and secondary coil.

for first type , Let no of turn in primary = n and no of turn in secondary = n₁

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so

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n = n₁ /3

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For second type , let no of turn in secondary = n₂

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n₂/n = .5

n₂ = .5n

n₂ / n₁ = .5n / 3n

n₂ / n₁ = 1 / 6

n₁ = 6n₂

option d is correct .

7 0
3 years ago
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