Answer:
The speed of the chair just before impact is 22.54 m/s
Explanation:
From the question,
The chair was initially at rest, that is, the initial velocity of the chair is 0 m/s.
Since the chair was thrown from a balcony, the chair will fall freely due to gravity.
To determine the speed of the chair just before impact, we will determine the final velocity of the chair.
From one of the equations of linear motion for objects falling freely due to gravity,
v = u + gt
Where v is the final velocity
u is the initial velocity
g is the acceleration due to gravity (Take g = 9.8 m/s²)
and t is time
From the question,
u = 0 m/s
t = 2.3 secs
Then, v = u + gt becomes
v = 0 + (9.8)(2.3)
v = 9.8 × 2.3
v = 22.54 m/s
Hence, the speed of the chair just before impact is 22.54 m/s.
Gravitational forces are stronger over shorter distances, and
weaker over longer distances. That's a big part of the reason
why our bodies are attracted to the Earth with more force than
we're attracted to Jupiter, for example.
The force doesn't just get weaker in proportion to the distance.
It gets weaker in proportion to the SQUARE of the distance.
The change in the frequency of the sound, due to the relative motion of the source of sound and the observer, is determined by the Doppler's Effect.
The speed of the ambulance (source) is "6517 m/s"
The equation of Doppler's Effect is given as follows:
where,
= frequency of sound measure by observer = 100 Hz
v = speed of sound = 343 m/s
= speed of observer = 0 m/s
= speed of ambulance (source) = ?
= actual frequency = 2000 Hz
Therefore, using the values, we get:
<u>v_s = 6517 m/s</u>
Learn more about Doppler's Effect here:
brainly.com/question/1330077?referrer=searchResults
Answer: It is our need for company that urges us to make friends. So we make friends for companionship.
<u>Explanation:</u>
The kind of reward that we want from friendship is companionship.
- We make friends for a company. It is our need for a company that urges us to make friends.
- We enjoy when we have a friend. Life becomes relaxed.
- Our friend is our companion so we can easily share our problems with him or her.
The positive way that we can get this reward of companionship is
- Man is a social animal. He needs a company to live, otherwise, he cannot survive. So companionship satisfies our social needs.
- Human beings are emotional too. They need to share their feelings. So they can share it with their companion. We are emotionally satisfied.
∑ Hey, Lethality ⊃
Answer:
5 x 5 = 30
6.0 x 70 = 400
Explanation:
<u><em>Given:</em></u>
<em>Multiply each of these numbers using SIG FIGS. (Significant Figures)</em>
<em>5 x 5</em>
<em />
<em>6.0 x 70</em>
<em />
<u><em>Solve:</em></u>
<em />
<em>-------------------------------------------------------------------------------------------------------------</em>
- <em>5 x 5</em>
- <u><em>2</em></u><em>5</em>
- <em>30</em>
<em>Answer : 30</em>
<em>Significant Figures: 1</em>
<em>-------------------------------------------------------------------------------------------------------------</em>
<em>6.0 x 70</em>
<u><em>4</em></u><em>20</em>
<em>400</em>
<em>Answer: 400</em>
<em>Significant Figures: 1</em>
<em>-------------------------------------------------------------------------------------------------------------</em>
<em />
<u><em>xcookiex12</em></u>
<em>8/23/2022</em>