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tiny-mole [99]
4 years ago
9

PLZ HELP

Physics
1 answer:
Vitek1552 [10]4 years ago
8 0

1st

Cell phones depend on both mechanical and electromagnetic waves to be useful. Which answer below correctly identifies how each wave is used in cell phones?

Correct option

Mechanical waves allow the cell phone to emit a sound when ringing; Electromagnetic waves allow a signal to be picked up when making a call.

(Mechanical waves, made by oscillating a membrane inside the phone are responsible for sound. While electromagnetic waves, such as radio signals, allow us to make phone calls)

2nd

True or False. The Electromagnetic Spectrum can be described in terms of wave energy, frequency, and wavelength.

Correct option

True because the electromagnetic spectrum is ordered based on wave energy, which is described on a wave as wavelength and frequency.

(These are the basic characteristics of an electromagnetic wave, and depending of the frequency, they carry an specific amount of energy.)

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*PLEASE HELP WILL GIVE BRAINLIEST*
levacccp [35]

Answer: The order is 2,1,5,4,3

Explanation: Hope This helps.

3 0
3 years ago
What are the functionssss of non-geostationary satellite?​
11111nata11111 [884]

Answer:

<h2>A communication system comprising a set of non-geostationary satellites provides communication links between ground stations and terminals, a communication link from a particular station via a satellite terminating at associated terminals in a limited geographical era including the station and providing a.</h2>

Explanation:

<h2>Hopes this helps. Mark as brainlest plz!</h2>
8 0
3 years ago
Read 2 more answers
Which material is more closely related to the styrofoam? a. heat exchanger b. diffuser c. insulator d. electrical conductor
nirvana33 [79]

The material that is more closely related to the Styrofoam insulator.

Styrofoam is the term that is used for polystyrene foam in a trademark form. It is a petroleum-based plastic.

Keeping something warm includes the stopping of the transfer of heat from one object to another. This is how insulation works.

Styrofoam is an insulator, which means it'll help keep the heat from the environment out of your cooler. However, you'll still need cooling agents (like ice packs) to make the cooler cold in the first place.

Styrofoam is usually made mostly of air, which means it is a poor conductor of heat, but an excellent convector. It traps the air in small pockets, which blocks the flow of heat energy. This reduces both conduction and convection and makes Styrofoam a good insulator.

To learn more about Styrofoam here

brainly.com/question/21369568

#SPJ4

8 0
2 years ago
A loop of radius r = 3 cm is placed parallel to the xy-plane in a uniform magnetic field = (0.75 T) . The resistance of the loop
matrenka [14]

Answer:

i = 0.00077A

Explanation:

Given:

loop radius, r = 3.0 cm = 0.03 m

Area, A = π x r² = π x 0.03² = 0.0028 m²

Magnetic Field, B = 0.75 T

Loop resistance, R = 18 Ω

time, t = 0.15 seconds

Now,

the induced emf is given as:

EMF = - BA/t .......1

Likewise,

EMF = iR.......2

Equate 1 and 2

iR = - BA/t

i = - BA/tR

i = 0.75×0.0028/0.15×18

i = 0.0021/2.7

i = 0.00077A

8 0
3 years ago
Calculate accelerationof the following. calcutale the acceleration of josh rding his biycle in a straight line that speeds up fr
BartSMP [9]

Explanation:

Wooho Physics my favorite subject! And my 100th answer :)

We will use the formula

\boxed{\tt{ Acceleration = \dfrac{v - u}{t}}}

  • Where v is Final velocity
  • And u is Initial velocity.
  • t is time taken.

In this question :-

  • u is 4 m/s
  • v is 6 m/s
  • t is 5 seconds

Applying the formula:-

\sf{ Acceleration = \dfrac{6 - 4}{5}}

\sf{ Acceleration = \dfrac{2}{5}}

So, Acceleration is 0.4 m/s² is the answer.

Hope it helps :)

8 0
3 years ago
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