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3 years ago

10

how much time would it take for the sound of thunder to travel 2000 meters if the sound travels at the speed of 330 meters per s

ec

1 answer:

AlekseyPX3 years ago

6 0

(2,000 m) / (330 m/s) = 6.06 seconds (rounded)

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2 years ago

An airliner arrives at the terminal, and its engines are shut off. The rotor of one of the engines has an initial clockwise angu

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(a) 1200 rad/s

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Solving for $\omega_f$ , we find the final angular speed after 10.0 s:

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(b) 25 s

We can calculate the time needed for the rotor to come to rest, by using again the same formula:

$\alpha = \frac{\omega_f - \omega_i}{t}$

If we re-arrange it for t, we get:

$t = \frac{\omega_f - \omega_i}{\alpha}$

where here we have

$\omega_i = 2000 rad/s$ is the initial angular speed

$\omega_f=0$ is the final angular speed

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Solving the equation,

$t=\frac{0-2000 rad/s}{-80.0 rad/s^2}=25 s$

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3 years ago