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8_murik_8 [283]
3 years ago
10

32. In Fiji, the firewalkers perform on pumice after going into a cataleptic trance. Why is pumice especially suitable?

Physics
1 answer:
Anuta_ua [19.1K]3 years ago
5 0

Pumice is used for cleaning foot. Foot are wet with warm water and then scrub by pumice so that hard and dry skin can be removed. It is quite effective in cleaning skin.

Pumice is also used as light weight material in concrete mix. Due to it porous texture, it is a good light weight material.

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It makes the data thet they collect more reliable so if they need the data again, they have already tested it a few times so therefor they know that it is right.
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3 years ago
A transformer is to be used to provide power for a computer disk drive that needs 6.0 V (rms) instead of the 120 V (rms) from th
Ipatiy [6.2K]

Answer:

N_{2}=20 turns

Explanation:

The given case is a step down transformer as we need to reduce 120 V to 6 V.

number of turns on primary coil N_{P}= 400

current delivered by  secondary coil  I_{S}= 500 mA

output voltage = 6 V (rms)

we know that

I_{p}=\frac{V_{out}}{V_{in}\times I_{s}}

putting values we get

I_{p}=\frac{6}{120\times 0.5}

I_{p}= 0.1 A

to calculate number of turns in secondary

\frac{N_{2}}{400} =\frac{6}{120}

therefore, N_{2}=20 turns

5 0
3 years ago
A driver looks at her dashboard and reads that she is traveling at 100 kilometers per hour. What does this measurement represent
Dmitry_Shevchenko [17]
The answer is C!! 100 kilometers per hour is an average speed.
6 0
3 years ago
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Is it possible for surfers to use dynamite to produce water waves that are suitable for surfing
hammer [34]

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7 0
3 years ago
What was the hikers average velocity during part c of the hike?
Brrunno [24]

Answer:

6 km/h west

Explanation:

During part c of the hike, the hiker moved 6 km west, and the time was 9.45 am to 10.45 am.

So, we have:

- displacement: d = 6 km west

- time taken: from 9.45 am to 10.45 am = 1 hour

Therefore, the average velocity is given by the ratio between displacement and time taken:

v=\frac{d}{t}=\frac{6 km}{1 h}=6 km/h

and the direction is the same as the displacement (west)

6 0
3 years ago
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