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3 years ago

Higher-pitched sounds have blank

1 answer:

4 0

Answer:

Explanation:

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rewona [7]

I believe the answer is C

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3 years ago

Lemur [1.5K]

The kinetic energy bc the energy is independent of the gravitational acceleration, and it depends only on the speed and mass. So the last answer

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3 years ago

Illusion [34]

C. Friction is the answer

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4 years ago

fgiga [73]

Answer:

30cm

Explanation:

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3 years ago

nignag [31]

Answer:

The acceleration of the train is 5 m/s².

Explanation:

Acceleration is the change in velocity over a given time interval.

Therefore, acceleration is given as:

$a=\frac{v_{f}-v_{i}}{\Delta t}$

Where, $v_{i}\textrm{ and }v_{f}$ are initial and final velocities and $\Delta t$ is the time interval.

Here, $v_{i}=5\textrm{ m/s},v_{f}=45\textrm{ m/s},\Delta t=8\textrm{ s}$

This gives,

$a=\frac{45-5}{8}=\frac{40}{8}=5\textrm{ }m/s^{2}$

Therefore, the acceleration of the train is 5 m/s².

4 0

3 years ago