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mina [271]
3 years ago
5

imagine que você se encontra parado à frente de um espelho plano, que também se encontra em repouso. imagine agora que esse espe

lho passe a se deslocar com uma velocidade constante e igual a 10 m/s. neste caso a velocidade da imagem formada, em relação a você, que é o objeto fixo da situação, será igual a:
Physics
1 answer:
atroni [7]3 years ago
4 0

Answer:

The speed of the image is changing with the same 10 m/s speed, in the direction of the mirror's motion.

Explanation:

For a flat mirror, it is known that the object distance is always equal to the image distance, this is proven from the mirror equation

(1/f) = (1/u) + (1/v)

f = focal length = ∞ (for a flat mirror, the focal length is theoretically imfinity)

v = image distance from the mirror

u = object distance from the mirror

For a flat mirror, (1/f) = (1/∞) = 0

0 = (1/u) + (1/v)

(1/v) = -(1/u)

v = -u

The minus sign means that the image distance is measured in the opposite direction to the object distance.

(dv/dt) = -(du/dt)

So, if the mirror starts moving at a particular speed, as long as the object doesn't move, the object's distance from the mirror is changing according to the speed of the mirror alas in the direction opposite the mirror's motion.

Hence, if (du/dt) = -10 m/s

(dv/dt) = 10 m/s

Meaning that the speed of the image is changing with the same 10 m/s speed, in the direction of the mirror's motion.

Hope this Helps!!!

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Think of a time where you have observed someone's behavior and been encouraged to do the same. What did you do? Was it a good or
ololo11 [35]

Answer:

i'm not sure if you are asking as a  personal question or a book question so i'm taking it personal.

Explanation:

I was doing a simple task that was handed to me to test my responsibility and I agreed (knowing i am responsible :3). my first thought was "man , this is easy!" but then i started seeing the other kids slaking off and quiting their tasks. I thought that was against the rules, but then i saw my bff doing it too and i thought "this should be ok then!" so i did the same. other kids where still doing it. the teacher came, saw the ones still working and smiled... but when the teacher looked at the ones slaking off omg... his face was like * im gonna kill yall* we took one big gulp and whined. the teacher awarded the ones who completed the task... the others , we had to do our original task but doubled... for 3 weeks!!! it was awful!!!

I WOULD NEVER DO THAT AGAIN!!!

5 0
2 years ago
Achilles and the tortoise are having a race. The tortoise can run 1 mile (or whatever the Hellenic equivalent of this would be)
fenix001 [56]

Answer:

Surely Achilles will catch the Tortoise, in 400 seconds

Explanation:

The problem itself reduces the interval of time many times, almost reaching zero. However, if we assume the interval constant, then it is clear that in two hours Achilles already has surpassed the Tortoise (20 miles while the Tortoise only 3).

To calculate the time, we use kinematic expression for constant speed:

x_{final}=x_{initial}+t_{tor}v_{tor}=1+t_{tor}\\x_{final}=x_{initial}+t_{ach}v_{ach}=10t_{ach}

The moment that Achilles catch the tortoise is found by setting the same final position for both (and same time as well, since both start at the same time):

1+t=10t\\t=1/9 hour=0.11 hours

7 0
3 years ago
A boy jogs 250 meters in 110s what is the average speed
Artyom0805 [142]
The rule to get the average speed is as follows:
average speed = average distance / average time

We are given that:
distance = 250 m
time = 110 sec

Substitute with the givens in the above equation to get the average speed as follows:
average speed = 250/110 = 25/11 meters/sec
3 0
3 years ago
Explain the principles of effective team
steposvetlana [31]

Answer:

work relationship built on trust.

Explanation:

Align on a set of communication best practices understood by all members of the team. Create a work environment built on trust and empathy. Manage healthy conflict through standards, processes, and real-time feedback. Develop a support system through patience and discipline.

5 0
3 years ago
Stio
Ainat [17]

The true statements about magnetic fields and forces will be A,D and E.

<h3>What is a magnet?</h3>

An iron piece,alloy, or other substance with its constituent atoms arranged in such a way that it shows magnetism qualities,

The function of the magnet is attracting other iron-containing objects or aligning itself in a magnetic field.

There are two poles of the magnet;

1. North Pole.

2. South Pole.

The same poles repel each other, while the opposite poles attract each other. In a sense, south-south and north-north repel. While the north-south and the south-north attract each other.

The correct statements are;

(A). The north pole attracts the south pole of a magnet.

(D)Forces caused by magnetic fields are weaker farther from the magnet.

(E)Magnetic forces can act on an object even if the object isn't touching the magnet.

Hence, the true statements about magnetic fields and forces will be A,D and E.

To learn more about the magnet, refer to the link;

brainly.com/question/13026686

#SPJ1

3 0
2 years ago
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