3 years ago

What is meant by the term blue moon

1 answer:

4 0

“Once in a blue moon” is a common expression that has been used for a long time, and which means 'not very often,' or 'very rarely. ' It often refers to an extra full moon; however, it has been used to describe the way the moon actually looked, when for different reasons it had turned a blueish color.
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A spiral spring of natural length 20.00cm has a scale

iVinArrow [24]

The mass of the scale pan : 0.11 kg

<h3>Further explanation</h3>

Given

A spiral spring's length = 20 cm

mass 50 g ⇒ the length = 22 cm

mass 70 g ⇒ the length = 22.25 cm

Required

the mass of the scale pan

Solution

Hooke's Law :

$\tt F=k.\Delta x$

The spring constant (k) :

$\tt k=\dfrac{\Delta F}{\Delta x}=\dfrac{g.(70-50)}{22.25-22}=\dfrac{g.20}{0.25}=g.80~g/cm=10~m/s^2\times 8~kg/m=80~N/m$

mass of the scale pan=m(for 50 g mass) :

$\tt (m+0.05).g=80\times (0.22-0.20)\\\\m=0.11~kg$

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3 years ago

Please check if my answer is correct

emmasim [6.3K]

Answer:

Yep! it's correct might need to double check tho

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3 years ago

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Does earth's atmospheric pressure cause gravity?

konstantin123 [22]

The Earth's atmosphere is kept close to Earth by gravity. Just as the Earth's gravity keeps you firmly on the ground, it also acts on the gases of the Earth's atmosphere, holding it in place and allowing us to breathe.

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4 years ago

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Which type of electromagnetic waves has highest frequency

vesna_86 [32]

Answer:

Gamma rays have the highest energies.

Explanation:

HOPE IT WILL HELP ^_^

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