4 years ago

What criteria do astronomers use to classify an object as a planet

Physics

1 answer:

AVprozaik [17]4 years ago

7 0

Orbits a Star.... gravity makes it spherical.

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Find out how the position of the Sun would be different at 12:00 midday in December than in June. What path would the sun take f

Ratling [72]

Answer:

Explanation: The Sun is directly overhead at solar noon at the Equator on the equinoxes, at the Tropic of Cancer (latitude 23°26′11.2″ N) on the June solstice and at the Tropic of Capricorn (23°26′11.2″ S) on the December solstice.

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3 years ago

An object is placed a distance of twice the focal length away from a diverging lens. What is the magnification of the image?

Lesechka [4]

Answer:

+1/3

Explanation:

The lens equation states that:

$\frac{1}{f}=\frac{1}{p}+\frac{1}{q}$

where

f is the focal length

p is the distance of the object from the lens

q is the distance of the image from the lens

For a diverging lens, the focal length is negative: $f=-f$

and we also know that the object is placed a distance of twice the focal length, so $p=2f$

So we can find q from the equation above

$\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{-f}-\frac{1}{2f}=-\frac{3}{2f}\\q=-\frac{2}{3}f$

And the magnification of the image is given by

$M=-\frac{q}{p}=-\frac{-\frac{2}{3}f}{2f}=\frac{1}{3}$

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4 years ago

Read 2 more answers

draw a labelled ray diagram to locate the image of an object formed by a convex lens of focal length 20cm when the object is pla

azamat

<h3><u>Answer</u> :</h3>

<u>Focal length of convex lens is taken positive.</u>

$:\implies\sf\:\dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}$

$:\implies\sf\:\dfrac{1}{v}-\dfrac{1}{(-30)}=\dfrac{1}{20}$

$:\implies\sf\:\dfrac{1}{v}=\dfrac{1}{20}-\dfrac{1}{30}$

$:\implies\sf\:\dfrac{1}{v}=\dfrac{3-2}{60}$

$:\implies\:\boxed{\bf{\gray{v=60\:cm}}}$

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3 years ago

The velocity of a 150 kg cart changes from 6.0 m/s to 14.0 m/s. What is the magnitude of the impulse that acted on it?

tensa zangetsu [6.8K]

M = 150 kg.

Final velocity, v = 14 m/s

Initial Velocity, u = 6 m/s

Impulse = <span> m(v - u)</span>

= 150*(14 - 6)

= 150*8 = 1200 kgm/s or 1200 Ns<span> </span>

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3 years ago

If the net force acting on an object is not zero, then the object is definitely

balu736 [363]

Answer:

Explanation:

Since the net force is changing, and not the speed, it is C

Hope this helped!

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3 years ago