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2 years ago

Why is sound not an electromagnetic wave

Physics

2 answers:

pishuonlain [190]2 years ago

8 0

Answer:

There is no sound in space because there are no molecules there to transmit the sound waves. Electromagnetic waves are not like sound waves because they do not need molecules to travel. This means that electromagnetic waves can travel through air, solid objects and even space.

Mariulka [41]2 years ago

4 0

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1 year ago

If the mass of the products measured 120 g, what would be the mass of the reactants?

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According to law of conservation of mass, mass of reactant = mass of products

So answer is C

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3 years ago

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When this circuit is closed, which way do the electrons flow?

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Answer:

from the positive end of the battery through the capacitor through the resistors to the negative end...

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2 years ago

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An emf is induced in a conducting loop of wire 1.22 m long as its shape is changed from square to circular. Find the average mag

Afina-wow [57]

Answer:

The induced emf in the loop is $7.35\times 10^{-4}\ V$

Explanation:

Given that,

Length of the wire, L = 1.22 m

It changes its shape is changed from square to circular. Then the side of square be its circumference, 4a = L

4a = 1.22

a = 0.305 m

Area of square, $A=a^2=(0.305)^2=0.0930\ m^2$

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$A'=\pi r^2\\A'=\pi (0.194)^2\\\\A'=0.118\ m^2$

The induced emf is given by :

$\epsilon=\dfrac{\d\phi}{dt}\\\\\epsilon=\dfrac{\d(BA)}{dt}\\\\\epsilon=B\dfrac{A'-A}{t}\\\\\epsilon=0.125 \times \dfrac{0.118-0.0930}{4.25}\\\\\epsilon=7.35\times 10^{-4}\ V$

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2 years ago

A baseball with a mass of 0.15 kg is moving at a speed of 40 m/s. What is

Afina-wow [57]

Answer:

120 J

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KE = mv²/2 = (0.15 kg * [40 m/s]²)/2 = 120 J

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2 years ago

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