Will mark Brainliest it's due TODAY PLEASE HELP ME
2 answers:
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Answer:
2 revolutions
Explanation:
Assume that when she runs off the edge of the 8.3m high cliff, her vertical speed is 0. So gravitational acceleration g = 9.8m/s2 is the only thing that makes her fall down. So we can use the following equation of motion to calculate the time it takes for her to fall down:
where s = 8.3 m is the distance that she falls, t is the time it takes to fall, which is what we are looking for
Since she rotates with an average angular speed of 1.6rev/s. The number of revolutions she would make within 1.3s is
The characterization of paraffin/ultrasonic-treated diatomite for use as phase change material in thermal energy storage of buildings and it provides the highest surface area with least to no structural degradation.
<h3>What are the characterization of paraffin/ultrasonic-treated diatomite?</h3>- Paraffin/ultrasonic-treated diatomite is used as a phase change material or PCM in thermal energy storage of buildings.
- The diatomite is treated multiple times in ultrasonic sound for approximately sixty minutes or DA-60.
- This is done to achieve the optimum condition to improve the surface area.
- When the surface area reaches the highest, the structural degradation reaches minimum.
- 59°C is the melting point of the DA-60 composite phase change material. The latent heat of the same is 45.90
.
- A stable PCM will have proper thermal reliability which is attained through thermal cycling test of 500 cycles.
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