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Daniel [21]
3 years ago
8

During a firework show, a family sees the spray of sparkles from an exploding firework high in the sky and, a moment later, hear

s the pop. Which of these best explains why the pop and spray do not seem to occur at the same time?
a.Light and sound travel through air.
b.Sound travels through a vacuum.
c.Sound travels slower than light.
d.Light and sound travel at the same speed
Physics
1 answer:
jeka943 years ago
7 0

Answer:

c. Sound travels slower than light.

Explanation:

We see any thing because of the light emitted or reflected by it. Whereas the sound is carried by the sound waves. The speed of light is more than the speed of sound. This is the reason the family saw the fireworks first and then heard the sound.

The same can be experienced during the sighting of a Jet plane or a rocket where, we see them way before we can hear the roaring sound of its engines.

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2 years ago
A runner begins from rest at the starting line and travles for 6.5 seconds, a runner reaches a speed of 13.4 m/s what is the run
Butoxors [25]

The acceleration of the runner in the given time is 2.06m/s².

Given the data in the question;

Since the runner begins from rest,

  • Initial velocity; u = 0
  • Final velocity; v = 13.4m/s
  • Time elapsed; t = 6.5s

Acceleration of the runner; a = \ ?

<h3>Velocity and Acceleration</h3>

Velocity is the speed at which an object moves in a particular direction.

Acceleration is simply the rate of change of the velocity of a particle or object with respect to time. Now, we can see the relationship from the First Equation of Motion

v = u + at

Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.

To determine the acceleration of the runner, we substitute our given values into the equation above.

v = u + at\\\\13.4m/s = 0 + (a * 6.5s)\\\\13.4m/s = a * 6.5s\\\\a = \frac{13.4m/s}{6.5s}\\ \\a = 2.06m/s^2

Therefore, the acceleration of the runner in the given time is 2.06m/s².

Learn more about Equations of Motion: brainly.com/question/18486505

3 0
2 years ago
Kenny klutz drops his physics book off his aunt's high-rise balcony.it hits the ground below 1.5 s later?
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Kenny's book started out with no speed when it was dropped. 
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During the fall, its average speed was  1/2(0 + 14.7) = 7.35 m/s .

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                                             (7.35 m/s) x (1.5 sec) = 11.025 m

8 0
3 years ago
In being served, a tennis ball is accelerated from rest to a speed of m/s. the average power generated during the serve is 2920
omeli [17]
You didn't include the numerical value of speed. 
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3 years ago
A switch that connects a battery to a 30μf capacitor is closed. several seconds later you find that the capacitor plates are cha
Elanso [62]
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