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yanalaym [24]
3 years ago
11

Light from the sun travels in electromagnetic waves. Which of these statements describe electromagnetic waves?

Physics
1 answer:
kupik [55]3 years ago
7 0

Complete Question:

Light from the sun travels in electromagnetic waves. Which of these statements describe electromagnetic waves? Choose the 3 that apply.

Group of answer choices.

a) consist of transverse wave patterns.

b) can move through a vacuum.

c) caused by a vibration in a medium.

d) consist of longitudinal wave patterns.

e) requires a medium, such as air, to travel.

f) made of vibrating electric and magnetic fields.

Answer:

a) consist of transverse wave patterns

b) can move through a vacuum

f) made of vibrating electric and magnetic fields

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

Generally, the most commonly used electromagnetic wave technology in telecommunications is light and radio waves. Light from the sun travels in electromagnetic waves.

The statements which describe electromagnetic waves are;

I. It consist of transverse wave patterns.

II. It can move through a vacuum.

III. It is made of vibrating electric and magnetic fields.

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In order to waken a sleeping child, the volume on an alarm clock is doubled. Under this new scenario, how much more energy will
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Answer:4 times more energy will be striking the childbearing

Explanation:

Because Volume is directly proportional to amplitude of sound. Energy is proportional to amplitude squared. If you triple the amplitude, you multiply the energy by 4

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the angular speed of an automobile engine is increased at a constant rate from 1300rev/min to 2000rev/min in 3s (a) what is its
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What's is the kinetic energy of a .235-kg baseball thrown at 50.0m/s
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Answer:

34.51

Explanation:

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3 years ago
A 4.40-kilogram hoop starts from rest at a height 1.70 m above the base of an inclined plane and rolls down under the influence
Anestetic [448]

Answer:

The linear velocity is  v=4.08m/s

Explanation:

According to the law of conservation of energy

   The potential energy possessed by the  hoop at the top of the inclined plane is converted to the kinetic energy at the foot of the inclined plane

        The kinetic energy can be mathematically represented as

                    KE = \frac{mv^2}{2} + \frac{Iw}{2}

Where I is the moment of inertia possessed by the hoop  which is mathematically represented as

                 I = mr^2

Here R is the radius of the hoop

         w is the angular velocity which the hoop has at the bottom of the lower part of the inclined plane which is mathematically represented as

                          w = \frac{v}{r}

Where v linear speed of the hoop's center of mass just as the hoop leaves the incline and rolls onto a horizontal surface

      Now expressing the above statement mathematically

            potential \ energy = \frac{mv^2}{y} + \frac{Iw^2}{2}

               mgh = \frac{mv^2}{y} + \frac{Iw^2}{2}

=>            mgh =\frac{mv^2}{2} + \frac{(mr^2)(\frac{v}{r})^2 }{2}  

=>          mgh = \frac{mv^2}{2} + \frac{mv^2}{2}

=>           mgh = mv^2

=>              v = \sqrt{gh}

Substituting values

                v = \sqrt{9.81 * 1.7}

                  v=4.08m/s

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3 years ago
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