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hichkok12 [17]
3 years ago
14

Astar is 10 light years away from the earth. Suppose it brightens up suddenly today, after how long can we see this change?

Physics
1 answer:
Blababa [14]3 years ago
7 0

The phrase "light year" is a <u><em>distance</em></u> ... it's the distance that light travels through vacuum in one year.

When you look at an object located 1 light year away from you, you see it as it was 1 year ago.

If a star located 10 light years away from us suddenly brightens, or dims, or explodes, we see the event <em>10 years later.</em>

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Studentka2010 [4]
Force needed is 5×6=30
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3 years ago
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Crank

Answer:

U = 102.8 J (100 J to two significant digits)

Explanation:

potential energy converted = 20(9.8)(1.8) = 352.8 J

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energy (work) of friction 352.8 - 250 = 102.8 J

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3 years ago
if a star 100 light years from earth is beginning to expand into a giant star how long will it take for astronomers to observe t
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Answer:

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Because the lights will arrive at world after 100 years later.

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3 years ago
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ICE Princess25 [194]

At speeds over 30 mph, you should maintain a following distance of at least <u>three full seconds</u> behind the vehicle ahead of you.

As a general rule and common sense at a speed of 30 mph you can leave three full seconds so that you can achieve a prudent distance between the car you are driving and the car in front in order to be able to perform some kind of maneuver if an accident or unforeseen event occurs.

To count the full three seconds you can use the technique of counting the Mississippis as follows: Mississippi one, Mississippi two, Mississippi three.

<h3>What is an accident?</h3>

An accident is an unexpected event that generally causes damage, injury or negative consequences.

Learn more about accident at: brainly.com/question/28070413

#SPJ4

7 0
1 year ago
Quiero conoce amiga que tenga correo
34kurt
Hola , soy daniela .
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