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3 years ago

Electromagnetic waves can travel through empty space true or false

1 answer:

6 0

False. Heat radiation from the sun cannot reach Earth, we cannot receive TV or GPS signals from satellites, and we cannot detect the light from distant stars.
Oh, wait . . .

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what will be the focal lenght of a combined lens made by contact of two lenses of power +3D and -2D.

4vir4ik [10]

P_1=+3D
P_2=-2D

$\\ \bull\tt\dashrightarrow P=P_1+P_2$

$\\ \bull\tt\dashrightarrow P=+3D-2D=+1D$

Now

$\\ \bull\tt\dashrightarrow f=\dfrac{1}{P}$

$\\ \bull\tt\dashrightarrow f=\dfrac{1}{1}$

$\\ \bull\tt\dashrightarrow f=1m$

3 0

3 years ago

The greater the change in the speed of light in a different media the greater the angle of what?

valkas [14]

Answer:

Idk

Explanation:

8 0

3 years ago

Um chuveiro C e um forno de micro-ondas M são ligados, como não há circuito a seguir.

uysha [10]

Responder:

50A

Explicación:

Dado que el Um chuveiro y el microondas están conectados en paralelo, el mismo voltaje fluirá a través de ellos.

La potencia total consumida por ambos aparatos = 4800W + 1200W

La potencia total consumida por ambos aparatos = 6000W

Para obtener el I actual, usaremos la fórmula;

P = IV

6000 = 120I

Yo = 6000/120

Yo = 50 A

Por lo tanto, la medición de corriente del amperímetro ideal A será 50A

3 0

3 years ago

If a substance has a pH of 10 -11, it is considered a ...

Mrac [35]

Answer:

Base

Explanation:

anything with a pH between 0-6 is an acid. pH of 7 means neutral. 8-14 means it is a base

hope I helped :)

8 0

4 years ago

The formation of the solar system in order from start to finish

KatRina [158]

<h2><u>FORMAT</u><u>ION</u></h2>

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Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material

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Hope It Helps!

6 0

3 years ago