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3 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Physics

2 answers:

larisa86 [58]3 years ago

7 0

Answer:

TRUE

Explanation:

Grounding of an object means we connect the given object to the earth by a conducting wire.

here we know that Earth is considered as a large conductor with ZERO potential which means if we connect an object to the earth then it will come to zero potential.

Now if an object is initially charge and then it is connected to Earth for grounding then in that case the final potential of the object must be zero.

In order to make the final potential to be zero we need to transfer all its charge to the earth so in order to make it neutral either electrons are flowing into the object or it will flow out of the object.

so here this is a TRUE statement

Serhud [2]3 years ago

4 0

True,
Explanation: because it’s the same reason that lighting touches the ground/ goes up to the sky, because it is trying to balance out its charges

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Answer:

The range of wavelengths of the sound is 7692.30 m and 3846.15 m

Explanation:

A bat emits pulses of sound at a frequency between 39 kHz and 78 kHz. It is required to find the range of wavelengths of this sound.

Bat uses ultrasonic waves. It moves with the speed of light.

If f = 39 kHz,

$\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{39\times 10^3}\\\\\lambda=7692.30\ m$

If f = 78 kHz,

$\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{78\times 10^3}\\\\\lambda=3846.15\ m$

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3 years ago

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2 years ago

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Answer:

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