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LenaWriter [7]
3 years ago
10

Two helium-filled balloons are released simultaneously at points A and B on the x axis in an earth-based reference frame. Balloo

n A is to the left of balloon B. Which one of the following statements is true for an observer moving in the +x direction?
A. The observer sees balloon B released before balloon A.
B. The observer always sees the balloons released simultaneously.
C. The observer could see either balloon released first depending on her speed and the distance between A and B.
D. The observer sees balloon A released before balloon B.
Physics
1 answer:
Vedmedyk [2.9K]3 years ago
5 0

Answer:

The correct answer is C

Explanation:

In this exercise you are asked to analyze the following situation: for a fixed observer, the two balloons are launched at the same time.

If the observer is mobile moving towards the positive side of axis ax we have several

possibilities when starting the movement

* the observer is to the left of the two balloons

* the observer is between the two balloons

* the observer is to the right of the two baloomls

The time it takes for the signal to arrive to know which ball goes first is

             v = d / t

             t = d / v

If the signal goes at the speed of light, the speed is a constant and the time will depend only on the distance, so we see that the trigger changes depending on the relative position between a given ball and the observer.

Consequently, it will be seen which comes out first, depending on the relative position with the observer.

           

The correct answer is C

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KonstantinChe [14]

Answer:

c. Velocity

Explanation:

Velocity is a measure of change of position of the body with time. Change of position means the distance traveled by the object in a given interval of time but in a particular direction.

We know that speed is given as the distance traveled over a given time interval without taking into account the direction of motion. So, the magnitude of velocity is same as its speed. Velocity, being a vector quantity, has both magnitude and direction.

Therefore, the <u>velocity</u> of an object consists of its speed and direction.

8 0
3 years ago
A 20-kg rock sits atop a 30 meter cliff. How much potential energy does it have?
Brut [27]
Gravitational potential energy ...

=  (mass) x (acceleration of gravity) x (height)

=  (20 kg) x (9.8 m/s²) x (30 m)

=   (20 x 9.8 x 30)  kg-m²/sec²

=   5,880 joules
6 0
3 years ago
Jonathan is pushing a 25 kg box with a force of 135 N. The friction opposing the motion is unknown. The overall net force for th
disa [49]

The magnitude of the frictional force of the box is 65 N

From the question given above, the following data were obtained:

  • Mass (m) = 25 Kg
  • Force applied (Fₐ) = 135 N
  • Net force (Fₙ) = 70 N
  • Frictional force (Fբ) =?

The frictional force acting on the box can be obtained as follow:

Fₙ = Fₐ – Fբ

70 = 135 – Fբ

Collect like terms

70 – 135 = – Fբ

–65 = –Fբ

Multiply through by –1

<h3>Fբ = 65 N</h3>

Thus, the frictional force of the box is 65 N

Learn more on Frictional force: brainly.com/question/25767576

8 0
2 years ago
How are electric currents formed?
Vadim26 [7]

Answer:

Electric current can be generated by moving a metal wire through a magnetic field.

7 0
3 years ago
Please help me, I don’t know the answer
AfilCa [17]

Answer:

I'm pretty sure it is D:2.

Explanation:

Since potential energy is basically something sitting still. If not C then D.

6 0
3 years ago
Read 2 more answers
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