All of the mineralls have a hardness rating less than what he used to perform the scratch test, with the exception of the quartz which had a higher hardness rating.
To find the force we use the formula,
F = ma , where m is mass and a acceleration
Using the formula,
F = ma
F = 0.42 x 14.8
F = 6.216 N / 6.22 N
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Answer:
The waves travel at the same speed, but the observed frequency depends on any relative motion between the observer and source. When the observed frequency changes, so does the wavelength. If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases
Explanation:
Hope it helps.
girl how someone supposed to help you with that?!
m = 0.30kg h = 5m g = 9.8m/s^2
Ep = m•g•h
Ep = 0.30kg x 9.8m/s^2 x 5m
Ep = 14.7 J
Ep = 15J (rounded)