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Andrej [43]
3 years ago
9

When you rub a match against a rough surface, fire results, giving off light and heat. The law of conservation of energy says th

at energy cannot be created.
How can you explain the fire seeming to come from nowhere?

The energy was stored in chemical bonds before it became heat and light.
Matches are made to take up energy from surfaces.
The energy started out as the sound energy of the rubbing match.
Physics
2 answers:
Trava [24]3 years ago
7 0
The law of conservation of energy states that energy can neither be created nor destroyed. striking a match stick with a surface that conducts heat, it is not part of the law
shutvik [7]3 years ago
4 0
The energy was stored in chemical bonds before it became heat and light, it is the result when you rub a match against a rough surface. Energy can not be created nor destroyed but it can be stored, potential energy is stored in a match when you strike it, it releases that energy.
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30 points ᖗ☯ ͟ل͜☯ᖘ
Butoxors [25]
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6 0
3 years ago
What is the mass of a child in a wagon that has a velocity of 10 m/s and a Momentum of 30 KG* M/S
LenKa [72]

Explanation:

sinces : Momentum = velocity × mass

then : 30 = 10 × m and m = 30 ÷ 10 = 3 kg

3 0
3 years ago
What can be found by counting the number of troughs per second in a wave diagram
QveST [7]
Frequency can be found by counting the number of troughs per second in a wave diagram.
6 0
3 years ago
How many milliliters are in 1.2 L ( 1 mL= 0.001 L
alisha [4.7K]
1200 mL

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Hope this helps:)
4 0
3 years ago
A 3kg object moving at 4 m/s encounters a 20 N resistive force over a duration of 0.20 seconds. The impulse experienced by this
WITCHER [35]

Answer:

the impulse experienced by this object is 4 Ns

Explanation:

Given;

mass of the object, m = 3 kg

velocity of the object, v = 4 m/s

resistive force, F = 20 N

duration of impact, t = 0.2 s

The impulse experienced by this object is calculated as follows;

J = F x t

J = 20 x 0.2

J = 4 Ns

Therefore, the impulse experienced by this object is 4 Ns

3 0
3 years ago
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