Answer ASAP Describe how electromagnetic waves are formed and travel through space.

2 answers:

Natasha2012 [34]3 years ago

7 0

In simpler terms, electromagnetic waves are generated by a changing electric or magnetic dipole. When two charges, or magnetic poles, are changing either their position or their strength, the electromagnetic fields around them must change in response. This response can only change at the fastest possible wave speed for electromagnetic radiation: the speed of light.

In general, these waves form from the vibrations of electric and magnetic fields. Unlike mechanical waves, electromagnetic waves do not need a medium to propagate, allowing them to travel through air, solids and vacuum (empty space), which is why they could travel even to outer space. A good example of these are radio waves which travels very fast through space (in light speed which is about 186,000 mi/sec).

zhenek [66]3 years ago

5 0

Electromagnetic waves are created by a charged particle that generates an electric field. The electric field creates a magnetic field. As the charged particle moves, the electric field and magnetic field keep changing, which causes the wave to move.

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Which of the following statements are true? (Select all that apply.) Ammeters have a relatively high resistance and are placed i

xenn [34]

Answer: Ammeters have a very low resistance and are placed in series with a resistor.

Ammeters have a very low resistance so as to not significantly alter the total resistance of a circuit.

Voltmeters have a relatively high resistance and are placed in parallel with a resistor.

Explanation: An ammeter is a device which used to measure current in a circuit. Thus, it is placed in series with the other components of the circuit. In series, the current remains same throughout the circuit and depends on the net resistance of the circuit.

This, the ammeter must have very low resistance so that it doesn't alter the net resistance of the circuit.

A voltmeter is a device which is used to measure potential drop across a component in a circuit. Thus, it is placed in parallel combination to to the component. The resistance of a voltmeter must be high so that no current flows through it and alters the potential drop across the component.

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Suppose that volumes of four stars in the Milky Way are 2.7 x 1018 km3, 6.9 x 1012 km3, 2.2 x 1012 km3, and 4.9 x 1021 km3. What

Irina18 [472]

Answer:

The order is Star 3 < Star 2 < Star 1 < Star 4

Explanation:

Lets name the stars with their written order.

Star 1: 2.7 x 10^18 km3

Star 2: 6.9 x 10^12 km3

Star 3: 2.2 x 10^12 km3

Star 4: 4.9 x 10^21 km3

Star with lowest power of 10 has the least volume. Therefore, star 2 and star 3 would be the stars with least volume. Star 2's coefficient is better than Star 3. Thus, the order will be Star 3 < Star 2 < Star 1 < Star 4.

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Varvara68 [4.7K]

Answer:

Electrons will start moving faster in the circuit

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The answer would be D
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4 years ago

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prohojiy [21]

Answer:

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Explanation:

in this question we have given

mass of bucket=20kg

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