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liubo4ka [24]
3 years ago
13

A millimeter is _______ meter(s). A. 1,000 B. 100 C. 1/100th D. 1/1,000th

Physics
1 answer:
Zielflug [23.3K]3 years ago
7 0
1 millimetre is 0.001 metre.
1 metre is 1,000 millimetres.
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Give an example in which velocity is zero yet acceleration is not.
NeTakaya

Answer:

(1) Oscillation of simple pendulum (2) Dropping a ball from a certain height vertically

Explanation:

Instantaneous velocity can be zero even if acceleration is non zero .

Example 1 : Consider the case of a simple pendulum which is oscillating, when bob is at the extreme position, then the bob stops for a moment ( velocity is zero there ) but acceleration is non zero due to which it reverses it’s motion .

Example 2 : When someone drop the ball from a certain height then the initial velocity of the ball is zero at that point but the acceleration is not zero it is in downward direction . This downward acceleration will increase the velocity from zero.

4 0
3 years ago
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The near point (smallest distance at which an object can be seen clearly) and the far point (the largest distance at which an ob
luda_lava [24]

Answer:

Edouard > Berenica  > Chdwick > Francesca =  Avishka = Danya

Explanation:

The near and far vision points for a normal person are

     Close view 25 cm

     Far vision  infinite

Let's use the constructor equation to raise the object to these points

Close vision

           1 / f = 1 / o + 1 / i

where f is the focal length, or the distance to the object and i the distance to the image, in this case i must be 25cm for everyone, as this distance is on the same side as the object is negative, according to the optical sign convention

   

Avishka

 The distance to the object is 40 cm

      1 / f = 1 / 0.40 - 1 / 0.25 = -1.5

       

Focal power P is the inverse of the focal length in meters

      P = 1 / f = -1.5 D

The vision for the far point is normal and therefore does not require correction   P=0

Berenice

Distance to the object that can see o = 0.30 m

     1 / f = P = 1 / o + 1 / i

     P = 1 / 0.30 -1 / 0.25

     P = -0.67 D

Far vision correction

    o = 500cm = 5m

    1 / f = 1 / o + 1 / i

    P = 1/3 + 1 / inf

    P = 0.33 D

Chadwick

Close point of view is normal, so does not require correction

Far vision point

       1 / f = 1/5 + 1 / inf

       P = 0.2 D

Danya

Has normal vision does not require glasses

        P = 0

Edouard

Close view point

     o = 80cm = 0.80m

     1 / f = 1 / o + 1 / i

     1 / f = 1 / 0.80 - 1 / .25

     P = -2.75 D

Far vision point

     o = 200cm = 2m

      P = 1 / f = ½ + 1 / onf

      P = 0.5 D

Francesca

Close vision point

      o = 50 cm = 0.50 m

       1 / f = 1 / 0.5 - 1 / .25

       1 / f = -2 D

Normal far vision point

We write in summary the focal power for each person and each point

Person    Near point    Far point

Avishka       -1.5D               0

Berenice     -0.67D            0.33D

Chadwick     0                    0.2D

Danya           0                    0

Edouard       -2.75D            0.5D

Francesca     -2D                 0

In order of the lenses required from highest to lowest we have , por teh near ponint myopia

 Edouard> Francesca> Avishka> Berenice> Chanwick> Danya

Para el point of the far vision  (hyperopic)

Edouard > Berenica  > Chdwick > Francesca =  Avishka = Danya

7 0
3 years ago
You walk with a velocity of 2 m/s north. You see a man approaching you, and from your frame of reference he has a speed of 3 m/s
kupik [55]
The answer to this question would be: 1m/s

When you are walking to the north with 2m/s velocity, the stationary object(velocity=0m/s) will look like moving south at 2m/s velocity. That happens because the relative distance between you and the object is reduced by 2m/s in both conditions. In this question, the man seems like have 3m/s velocity. The real velocity should be:
3m/s - 2m/s = 1m/s
5 0
3 years ago
Help me with number 2 please
NARA [144]
The answer would be B. An example of this would be the Noble gasses. They include: Helium, Argon, Neon, and so on. They are all located on the very right side because they share similar chemical behaviours; they dont react very easily because they have a full valence shell.
3 0
3 years ago
When a ball rolls downhill, the rolling motion results in the ball ____________.
emmainna [20.7K]

I am pretty sure it is A Becoming warm

Since it’s moving and causing friction which makes it warm


Hope this helps

Mark me brainliest

7 0
3 years ago
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