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Svetradugi [14.3K]
3 years ago
6

This is a sign of a chemical reaction that involves a new color being created during the reaction.

Physics
1 answer:
dedylja [7]3 years ago
4 0

Answer:

The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.

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3. How long will it take a ball to reach the ground if it falls from a cliff 25 m tall (starting from rest)? What if the ball we
Nady [450]

Answer:

2.26 s

Explanation:

Let's take down to be positive.

Given (in the y direction):

Δy = 25 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

25 m = (0 m/s) t + ½ (9.8 m/s²) t²

25 = 4.9t²

t = 2.26 s

If the ball instead had an initial horizontal velocity of 5 m/s, its initial vertical velocity is still 0 m/s.  So the time to fall is still 2.26 s.

4 0
3 years ago
In a series circuit with three bulbs,
elena-14-01-66 [18.8K]

In a series circuit, there is only one path for current to take. 
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making heat and light on its way through more bulbs, so the ones that
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8 0
3 years ago
The scientist who found a way to measure the distance between the sun and Venus which
Yakvenalex [24]

Answer:

Astronomer Edmond Halley

Explanation:

The astronomical unit using the transit of venus

The underlying principle behind Halley's method is called parallax

8 0
2 years ago
A 7kg object is dropped on Earth,. Assuming it has not yet hit the ground, what is the velocity of the object after 2 seconds of
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The answer would be 9.8 meters/ sec^2.

7 0
3 years ago
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How the season affects the price quality and availability of vegetables?
emmainna [20.7K]
Each vegetables and fruits will have different response to the varying temperature and atmospheric condition of the surrounding. Some may become rotten in a shorter period of time. In this regard the price would get lower in order for the goods to get sold easily. 
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