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kozerog [31]
3 years ago
12

What is the speed of a wave with a frequency of 2 Hz and a wavelength of 87 m?​

Physics
1 answer:
Deffense [45]3 years ago
7 0

v = λf

v = 87 x 2 = 174 m/s

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A person throws a ball straight up. He releases the ball at a height of 1.75 m above the ground and with a velocity of 12.0 m/s.
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Answer:

a) 1.22 s

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Explanation:

t = Time taken

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v=u+at\\\Rightarrow t=\frac{v-u}{a}\\\Rightarrow t=\frac{0-12}{-9.81}\\\Rightarrow t=1.22\ s

Time taken by the ball to reach the highest point is 1.22 seconds

s=ut+\frac{1}{2}at^2\\\Rightarrow s=12\times 1.22+\frac{1}{2}\times -9.81\times 1.22^2\\\Rightarrow s=7.339\ m

The maximum height the ball will reach above the ground is 1.75+7.339 = 9.089 m

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Explanation:

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