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melisa1 [442]
2 years ago
5

How do you know that a chemical change has happened

Physics
2 answers:
Maurinko [17]2 years ago
7 0

A substance is there now that wasn't there before. (And you didn't put it there.,)

Elodia [21]2 years ago
6 0

Answer:

theres is many states of chemical change but its not exaclty the same as physical the appearence might change alittle but chemical like frying a egg is a chemical change because a change of materials into another, new materials with different properties and one or more than one new substances are formed and the subtance changeing or the materials can show chemical changed happened you cant always see it but touching too like heat energy can show a chemical change

Explanation:

i hope this helps and keep ur grades up :)

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irinina [24]

Answer:

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5 0
3 years ago
How many Faces, Vertices and Edges are there on a cube?
Kay [80]
They have 6 faces
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3 0
3 years ago
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100 points! please help!!!
IRINA_888 [86]

Answer:

Explanation:

A plane flies due north (90° from east) with a velocity of 100 km/h for 2 hours.

With no wind, it will be 100*2 = 200 km north of its starting point.

But a steady wind blows southeast at 30 km/h at an angle of 315° from due east.

So the wind itself will blow the plane 30*2 = 60km at an angle of 315° from due east.

That is the same as 60*cos315° = 42.43km due east and 60*sin315° = -42.43km north.

Combining, the plane is at 42.43km due east and 200-42.43 = 157.57km due north from its starting point.

7 0
3 years ago
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Consider hitting a baseball with a bat. If we call the force on the bat against the ball the action force, identify the reaction
Nadya [2.5K]

Answer:

Explanation:

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3 years ago
A 0.50 kilogram ball is held at a height of 20 meters. What is the kinetic energy of the ball when it reaches halfway after bein
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3 years ago
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