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grin007 [14]
3 years ago
14

when we turn on a light switch or use the microwave, we use electricity. what are common sources or our electricity?

Physics
1 answer:
blagie [28]3 years ago
4 0

Answer:

solar, wind, hydro, natural resources

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Images formed by a convex mirror are always ​
gladu [14]

Answer:

Images formed by a convex mirror are always ​virtual

Explanation:

A virtual image is always created by a convex mirror, and it is always situated behind the mirror. The picture is vertical and situated at the focus point when the item is far away from the mirror. As the thing approaches the mirror, the image follows suit and increases until it reaches the same height as the object.

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4 0
2 years ago
A boy reaches out of a window and tosses a ball straight up with a speed of 10 m/s. The ball is 20 m above the ground as he rele
kirill115 [55]

Explanation:

It is given that,

Speed of the ball, v = 10 m/s

Initial position of ball above ground, h = 20 m

(a) Let H is the maximum height reached by the ball. It can be calculated using the conservation of energy as :

\dfrac{1}{2}mv^2=mgh'            

h'=\dfrac{v^2}{2g}

h'=\dfrac{(10)^2}{2\times 9.8}

h' = 5.1 m

The maximum height above ground,

H = 5.1 + 20

H = 25.1 meters

So, the maximum height reached by the ball is 25.1 meters.

(b) The ball's speed as it passes the window on its way down is same as the initial speed i.e. 10 m/s.

Hence, this is the required solution.                              

6 0
3 years ago
Why do we use the hydrogen spectrum to identify if a star is red or blue<br> shifted? *
Lady_Fox [76]

Answer:

But if you place a clear container filled with hydrogen gas between the flashlight and the prism, gaps appear in the smooth rainbow of colors, places where the light literally goes missing. The dark absorption lines of a star at rest (left) get shifted towards red if the star is moving away from Earth (right)

Explanation:

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2 years ago
What two main gasses are exchanged during the process of breathing??
Zina [86]
Oxygen and carbon dioxide
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You have two rocks made of the same material that are at the same
mr Goodwill [35]

Answer:

the rocks have the same amount of thermal energy

4 0
3 years ago
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