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Effectus [21]
3 years ago
15

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height

of its rebound bounce. The height of the rebound bounce is measured using a scale positioned behind the ball. In the above experiment, which condition would not be controlled?
A). the starting height of the ball
B). the surface the ball bounces on
C). the type of ball
D). the method to measure the rebound height of the ball

Physics
1 answer:
Virty [35]3 years ago
3 0

Answer:

A. The starting height of the ball

Explanation:

When we talk about controlled variables, we refer to the variable that should be kept the same throughout the experiment. The reason why we do this, is to limit anything else that is not being tested, that may affect the results of the experiment.

In the scenario given, the experiment is to see the relationship between the <u>initial height of a basketball</u> and the <u>height of its rebound bounce. </u>

So you the starting height of the ball should vary, meaning it is NOT controlled.

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Why did boy (the observer) hear the pitch of the sound change? What does this tell us about the frequency of the sound? Support
timofeeve [1]

Answer:

<u>because of the doppler effect</u>

Explanation:

<em>Remember</em>, the doppler effect refers to the changes in sound (frequency of sound) observed by a person who is in a position relative to the wave source.

In this example, we notice as the train comes closer to the boy, the sound becomes louder also increasing the pitch slightly, the doppler effect sets in when the train passes the boy because the boy notices a decrease in the pitch of the moving train.

We learn from the change in the observed sound of the train that the frequency of the sound is determined by the distance of the observer from the wave source.

In other words, the closer the source of the sound to the observer; the faster it travels to the observer, however, the farther it is; the lesser it is; the greater the sound heard.

5 0
2 years ago
The hottest climates on Earth are located near the Equator because this region
Ber [7]

You should select Choice-4 .

4 0
3 years ago
PLEASE HELP ASAP 36. The Doppler Effect applies to light in addition to sound. What do you call the phenomenon that causes dista
skad [1K]

Answer:

It's probably the Redshift and Blueshift

Explanation:

The light shifting towards shorter or longer wavelengths as objects in space (stars or galaxies) move closer or farther away from us. This phenomenon is known as the Redshifts and Blueshifts. The concept indicates us that the Universe is expanding.

Hope this helps you!

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3 0
3 years ago
One day you are driving your friends around town and you drive quickly around a corner without slowing down. You are going at a
Novay_Z [31]

Answer:

1.60 g

Explanation:

From the attached file below:

we can deduce that:

v =  v_x =v_y = 20 \ m/s \\t = 2s

The distance traveled by 2 s will be:

x = vt

x = 20 m/s × 2 s

x = 40 m

The length is quarter of the circle  with radius r,

so; if 2 πr = 4 x

Then radius (r) will be:

r = \frac{4x}{2 \pi}\\\\r = \frac{4*40}{2 \pi}

r = 25.5 m

The centripetal acceleration can be expressed as:

a = \frac{v^2}{r}

so;

a = \frac{(20 \ m/s^2)}{25.5 \ m}

a = 15.7 m/s²

the magnitude of the acceleration experienced by your unfortunate passengers in terms of acceleration due to gravity is then determined by the equation:

a' = \frac{a}{g} g

a' = \frac{15.7 \m/s ^2}{9.81 \ m/s^2}\ g

a' = 1.60 \ g

∴ The magnitude of the acceleration experienced by your unfortunate passengers during the turn = 1.60 g

6 0
3 years ago
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Where in the cell can you find the location of inherited traits?
sashaice [31]

Answer:

D.N.A

Explanation:

The d.n.a is where all the heriditary information is stored.

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3 years ago
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