Answer:
A sound level of 96 dB is <u>4 times</u> as intense as one of 90 dB
Explanation:
The formula of the intensity level of sound in decibels is given as follows:
Intensity Level = 10 log₁₀(I/I₀)
where,
I = Intensity of Sound
I₀ = Reference Intensity Level = 10⁻¹² W/m²
Therefore, for 96 dB sound level:
96 = 10 log₁₀(I₁/10⁻¹²)
log₁₀(I₁/10⁻¹²) = 96/10
I₁/10⁻¹² = 10^9.6
I₁ = (10⁻¹²)(4 x 10⁹)
I₁ = 0.004 W/m²
For 90 dB sound level:
90 = 10 log₁₀(I₂/10⁻¹²)
log₁₀(I₂/10⁻¹²) = 90/10
I₂/10⁻¹² = 10^9
I₂ = (10⁻¹²)(10⁹)
I₂ = 0.001 W/m²
Therefore,
I₁/I₂ = 0.004/0.001
<u>I₁ = 4 I₂</u>
Hence, the sound level of 96 dB is <u>4 times</u> as intense as one of 90 dB.
विद्यार्थी जीवनमा अनुशासनको विशेष महत्व हुन्छ। विद्यार्थी जीवन मा, विद्यार्थीहरु अनुशासित भएर आफ्नो जीवन मा सफलता प्राप्त गर्न सक्छन्। राम्रो शिक्षा हरेक विद्यार्थी नियमहरु को पालन गर्नु पर्छ
विद्यार्थी जीवन मा, प्रत्येक विद्यार्थी स्कूल को नियम अनुसार हिड्नु पर्छ। उसले आफ्ना शिक्षकहरुको आदेश पालन गर्नु पर्छ। उहाँको आदेश पालना गरेर, एक चरित्र, एक आदर्श र एक योग्य नागरिक बन्नुहोस्।
तसर्थ, प्रत्येक विद्यार्थी अनुशासन को पालन गर्नु पर्छ आफ्नो जीवन खुशी बनाउन को लागी। यसको साथसाथै, प्रत्येक विद्यार्थीले समय बर्बाद नगरी आफ्नो लक्ष्य हासिल गर्न कडा मेहनत गर्नुपर्छ।
Answer:
Lifetime = 4.928 x 10^-32 s
Explanation:
(1 / v2 – 1 / c2) x2 = T2
T2 = (1/ 297900000 – 1 / 90000000000000000) 0.0000013225
T2 = (3.357 x 10^-9 x 1.11 x 10^-17) 1.3225 x 10^-6
T2 = (3.726 x 10^-26) 1.3225 x 10^-6 = 4.928 x 10^-32 s
Answer:Both
Explanation:
There are three ways to increase the induced voltage in electromagnetic induction:
1) increase the speed at which the conductor moves through the magnetic field. This means that the lines of flux are cut more quickly and more emf is induced.
2) use stronger magnets which provides a stronger magnetic field and more densely packed lines of flux.
3) use a coil of multiple loops.
Hence both technicians were correct.
Answer:
I think its B
Explanation:
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