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kherson [118]
3 years ago
13

What reaction involves burning?

Physics
1 answer:
Alex_Xolod [135]3 years ago
6 0

Answer:

exothermic

Explanation:

An exothermic reaction is a chemical reaction that releases energy through light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy.

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Please help!!!! 70 points, i really need this! D:
jolli1 [7]

1. Frequency 2. measure from trough to trough

7 0
3 years ago
Read 2 more answers
How does a scientific theory compare to a scientific law?
shusha [124]

Answer:

In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory. It is a misconception that theories turn into laws with enough research.

Explanation:

Hope this helped

6 0
3 years ago
Read 2 more answers
Using diagram 1.1 and diagram 1.2, compare the number of turn of the coils, the pattern of the iron fillings and the angle of de
miss Akunina [59]

Answer:

The number of turns in the second coil is more than the coil 1.

Explanation:

The magnetic field lines are the imaginary path on which an isolated north pole moves if it is free to do so.

The tangent at any point to the magnetic field line, gives the direction of magnetic field at that point.

More be the crowd ness of magnetic field lines more is the strength of magnetic field.

Here the crowd ness of magnetic field lines is more in figure 2 , so the magnetic filed in figure 2 is more than 1. It shows that the number of turns in the second coil is more than the 1 and also the current in the coil 2 is more than 1 .

3 0
3 years ago
An irregularly shaped rock is placed in 50 mL of water. The new reading in the container is now 74.2 mL. If the mass of the rock
cricket20 [7]

Taking into account the definition of density, the density of the rock is 3.6583 g/mL.

<h3>Definition of density</h3>

Density is defined as the property that matter has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

<h3>Density of the rock</h3>

In this case, you know that:

  • Mass= 88.53 g
  • Volume of the rock= Volume after place the rock in the water - Volume of water= 74.2 mL - 50 mL= 24.2 mL

Replacing in the definition of density:

density of rock= 88.53 g÷ 24.2 mL

Solving:

<u><em>density of rock= 3.6583 g/mL</em></u>

In summary, the density of the rock is 3.6583 g/mL.

Learn more about density:

brainly.com/question/952755

brainly.com/question/1462554

#SPJ1

8 0
2 years ago
An oil drop with a mass of 8.3 grams and a charge of + 2.2 mC is floating 7.68 meters above a positively charged floor. What is
Alina [70]

Answer:

Correct answer:  Q = 0.247 μC

Explanation:

Since the oil drop floats, this means that the weight of the drop and the Coulomb force are equal.

F = m · g   drop's weight

Fc = k q Q / r² Coulomb force

where it was given:

k = 9 · 10⁹ N m²/C² dielectric constant,

q = 2.2 mC = 2.2 · 10⁻³ C drop's charge,

Q -   floor's charge,

r = 7.68 m distance between drop and floor

m = 8.3 grams = 8.3 · 10⁻³ kg drop's weight

and  g = 10 m/s²

F = Fc  ⇒ k q Q / r² = m · g ⇒ Q = m · g · r²/ k · q

Q = 8.3 · 10⁻³ · 10 · 7.68² / 9 · 10⁹ · 2.2 · 10⁻³

Q = 24.72 · 10⁻⁸ C = 0.2472 · 10⁻⁶ C = 0.2472 μC

Q = 0.247 μC

God is with you!!!

8 0
4 years ago
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