3 years ago

The emission spectrum of iodine is shown below. Which is the absorption spectrum?

Physics

1 answer:

garik1379 [7]3 years ago

6 0

Sorry Sorry Sorry Sorry Sorry Sorry Sorry Sorry

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Just before hitting the ball to the ground the ball had a kinetic energy of 12.5 J. Calculate the velocity of which the ball hit

lesantik [10]

Answer:

v = √(25/m)

Explanation:

KE = ½mv²

v = √(2KE/m)

We know the kinetic energy, but not the mass

v = √(25/m)

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2 years ago

A machine part has the shape of a solid uniform sphere of mass 245 g and diameter 4.30 cm . It is spinning about a frictionless

Alla [95]

Answer:

Angular acceleration, $\alpha =9.49\ rad/s^2$

Explanation:

It is given that,

Mass of the solid sphere, m = 245 g = 0.245 kg

Diameter of the sphere, d = 4.3 cm = 0.043 m

Radius, r = 0.0215 m

Force acting at a point, F = 0.02 N

Let $\alpha$ is its angular acceleration. The relation between the angular acceleration and the torque is given by :

$\tau=I\times \alpha$

I is the moment of inertia of the solid sphere

For a solid sphere, $I=\dfrac{2}{5}mr^2$

$\alpha =\dfrac{\tau}{I}$

$\alpha =\dfrac{F.r}{(2/5)mr^2}$

$\alpha =\dfrac{5F}{2mr}$

$\alpha =\dfrac{5\times 0.02}{2\times 0.245\times 0.0215}$

$\alpha =9.49\ rad/s^2$

So, its angular acceleration is $9.49\ rad/s^2$ . Hence, this is the required solution.

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3 years ago

For precipitation to form, cloud droplets must grow in volume by roughly __________ times.

tangare [24]

<span>For precipitation to form, cloud droplets must grow in volume by roughly one million times.

Hope I helped :)</span>

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3 years ago

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When water diffuses across a semi permeable membrane the process is called __________.

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Osmosis !!!!!!!!!!!!!!!!!!

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2 years ago

How were the fossil symbols and mountain belts helpful in deciding where to move the continents

devlian [24]

Hey there!

The fossil symbols and mountain belts provided clues as to where and how the continents were connected together before they had moved. The mountain belts showed scientists the direction those plates moved and the fossils indicated that similar dinosaurs or animals lived together in the same area.

Thank you!

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3 years ago