In which stage of sleep are you likely to experience hypnagogic sensations of falling asleep
1 answer:
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Heya!!
For calculate speed of the wave, lets applicate formula:
<u>Δ Being Δ</u>
f = Frequency = 50 Hz
v = Velocity = ?
= Wavelenght = 10 m
⇒ Let's replace according the formula:
⇒ Resolving
Result:
The speed of that wave is <u>500 meters per second.</u>
Good Luck!!
Answer:
B) 225 m/s^2
Explanation:
The rock hits the ground at 15m/s and travels 50cm=0.5m through the ground until it stops.
The acceleration is supposed to be uniform, so the formula we have to use is , which for acceleration is:
Taking the <em>downwards direction as positive</em> (the direction of traveling, so the initial velocity and displacement will be positive), substituting our values for that movement we have:
Where the <em>negative sign indicates that it is pointing upwards.</em>