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Darina [25.2K]
3 years ago
10

A swimmer standing near the edge of a lake notices a cork bobbing in the water. While watching for one minute, she notices the c

ork bob (from up to down to back up) 240 times. What is the frequency in Hz of the water wave going by?
Physics
1 answer:
timurjin [86]3 years ago
5 0

Answer:

4Hz (240 cycles/60 seconds = 4 cycles/second)

Explanation:

hope this helped!

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The 2.50 kg cube in the figure has edge lengths d = 6.50 cm and is mounted on an axle
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Answer:

0.191 s

Explanation:

The distance from the center of the cube to the upper corner is r = d/√2.

When the cube is rotated an angle θ, the spring is stretched a distance of r sin θ.  The new vertical distance from the center to the corner is r cos θ.

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Given m = 2.50 kg and k = 900 N/m:

T = 2π √(2.50 kg / (3 × 900 N/m))

T = 0.191 s

The period is 0.191 seconds.

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