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Ray Of Light [21]
3 years ago
12

Under which conditions do both convex and concave mirrors form virtual images? State whether or not each can form a real image.I

f the mirror can form a real image, describe how this occurs.
Physics
2 answers:
natali 33 [55]3 years ago
8 0
Concave mirror​s can make a real image.when the object is away from the mirror it is called real image and when the object is closer to the mirror it is called virtual mirror.
leva [86]3 years ago
6 0

Answer:

In case of concave mirror the real image will form when object is placed at a distance which is more than the focal length of the mirror.

So here if more distance from the mirror then we will have more chance to get real image.

Now if we wish to have virtual image using concave mirror then we can say that object must have to place at distance less than the focal length of the mirror.

So if object is placed closer to the mirror then the image must be virtual and erect.

Now in case of convex mirror we will say that image formed will be virtual image in all cases because the focal length of the convex mirror is always positive so it will always form virtual image.

So here concave mirror if distance of object is less than the focal length then it will form virtual image and if the distance of object is more than focal length then it will form real image. While is convex mirror it will always form virtual image.

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Which planet is smaller than Earth’s core?
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Answer:

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List 3 quantities of waves.
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Which of the following illustrates an increase in potential energy? Group of answer choices a wind-up toy winding down a person
horrorfan [7]

Answer:

A person climbs a set of stairs

Explanation:

Potential energy is said to be possessed by an object due to its position. As the height from the ground level increase, the potential energy increases. It is calculated by the below formula as :

P = mgh

Out of the given options, the option that illustrates an increase in potential energy is option (b) i.e. a person climbs a set of stairs. As he steps one stair, its position from ground increases. It means its potential energy increases.

7 0
3 years ago
A 25 kg child stands 2.5 m from the center of a frictionless merry‐go‐round, which has a 200 kg*m^2 moment of inertia and is spi
vodka [1.7K]

Answer:

Explanation:

a ) Time period  T = 2 s

Angular velocity ω = 2π / T

=  2π / 2 = 3.14 rad /s

Initial moment of inertia I₁ = 200 + mr²

= 200 + 25 x 2.5²

=356.25

Final moment of inertia

I₂ = 200 + 25 X 1.5 X 1.5

= 256.25

b ) We apply law of conservation of momentum

I₁ X ω₁ =  I₂ X ω₂

ω₂ = I₁ X ω₁ / I₂

Putting the values

w_2=\frac{356.25\times3.14}{256.25}

ω₂ = 4.365 rad s⁻¹

c ) Increase in rotational kinetic energy

=1/2 I₂ X ω₂² -  1/2 I₁ X ω₁²

.5 X 256.25 X 4.365² - .5 X 356.25 X 3.14²

= 684.95 J

This energy comes from work done against the centripetal pseudo -force.

7 0
3 years ago
If a boomerang is thrown 20 m in a straight line and returns exactly at the same spot from which it is thrown, what is its displ
Anettt [7]

Answer:

C) 0m

Explanation:

Since at the end of the day, it was not displaced

Displacement ti's a vector quantity

8 0
3 years ago
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