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3 years ago

13

What is the answer for this question?

1 answer:

svlad2 [7]3 years ago

4 0

Electromagnetic waves can travel through a vacuum. Because they do not give up energy in traveling, Electromagnetic waves can cross the great distances that separate stars and galaxies. Rays from the Sun travel nearly 150 million kilometers to reach Earth's surface.

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A ray of light bends upon entering a new medium. what is this phenomenon called?

Alina [70]

If C.) is meant to be refraction, it's C.)

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3 years ago

1) A sound wave produced by an alarm is heard 668m away 2.0s later. a) What is the speed of sound of the alarm in the air? b) Th

NARA [144]

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3 years ago

The strength of the electric field at a certain distance from a point charge is represented by e. What is the strength of the el

Masteriza [31]

Answer:

At twice the distance, the strength of the field is e/4

Explanation:

F = the strength of an electric field.

F is inversely proportional to the squared distance from the point charge.

mathematically,

F = k(e/d²)

hence, if d is doubled,keeping other forms constant

F = e/4,

7 0

4 years ago

Plz! How to solve this question? The answer is B.

LekaFEV [45]

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3 years ago

Which of the following is true about this lever?

zysi [14]

As we can see here the lever has two forces at two ends

1. 300 N

2. 200 N

now we need to find the Torque on the lever about the fulcrum

so we will have

1. clockwise torque due to force at right end is

$\tau_1 = d_1F_1$

$\tau_1 = 6(200) = 1200 Nm$

2. counterclockwise torque due to force at left end

$\tau_2 = d_2F_2$

$\tau_2 = 1(300) = 300 Nm$

so as per above calculations we can see that net torque on the lever is clockwise as it has more torque in clockwise direction

so <u>it will rotate clockwise</u>

6 0

3 years ago

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