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Mariulka [41]
3 years ago
15

El Niño occurs every 2 to 12 years. true false

Physics
2 answers:
wlad13 [49]3 years ago
8 0

yep this is true i took the test

Novosadov [1.4K]3 years ago
5 0
True
It is True I took the test
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Vector of magnitude 15 is added to a vector of magnitude 25. The magnitude of this sum
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Explanation:

Given that,

Magnitude of vector A, |A| = 15

Magnitude of vector B, |B| = 25

We need to find the magnitude of this sum.

The maximum sum of the resultant vector,

R_{max}=|A_1|+|A_2|\\\\=15+25\\\\=45

The minimum sum of the resultant vector,

R_{min}=|A_1|-|A_2|\\\\=15-25\\\\=-10

So, the magnitude of this sum either 45 or -10.

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3 years ago
Which of the following statements is true? A. X-rays have longer wavelengths than microwaves. B. Radio waves have shorter wavele
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D is correct, Gamma rays have the shortest wavelength.
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A complete series circuit consists of a 12.0 V battery, a 4.70 O resistor, and a switch. The internal resistance of the battery
RoseWind [281]

With the switch open, there's no current in the circuit, and therefore
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A wire 1 mm in diameter is connected to one end of a wire of the same material 2 mm in diameter of twice the length. A voltage s
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Answer:

T = 2 T₀

Explanation:

To answer this question let's write the expression for electrical conductivity

    σ = n e2 τ / m*

The relationship with resistivity is

       ρ = 1 /σ

Whereby the resistance

        R = ρ L / A = 1 /σ  L / A

We see that there is no explicit relationship between time and resistance, there is only a dependence on the life time (τ) that depends on the properties of the material, not on its diameter or length.

As also the average velocity or electron velocity of electrons is constant, the time to cross 2 mm in length is twice as long as the time to cross a mm in length

 T = 2 T₀

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