1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrej [43]
4 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]4 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]4 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.
You might be interested in
If the moon moved closer to the earth, how would the gravitational force between them change?.
hichkok12 [17]

If the moon moved closer to the earth, The gravitational force between them will increase.

This can be understood by Newton's law of universal gravitation. This is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

F_{gravitation} = G\frac{M_{1} M_{2}}{r^{2} }

If the moon moved closer to earth, the distance between them will be reduced, and as the force of gravitation is inversely proportional to the distance between the masses, the gravitation force increases.

Learn more about gravitation force here

brainly.com/question/12528243

#SPJ4

7 0
2 years ago
True or false around 250 million year ago, all the continents were joined in one landmass, called Cambria
Xelga [282]
This should be true, howl this helps
7 0
3 years ago
The force between two objects, each of charge +Q is measured as +F when the objects are separated a distance d apart. If the cha
dybincka [34]

Answer:

F'=4F

Explanation:

According to Coulomb's law, the magnitude of the force (F) between two  objects  with the same charge(+Q), separated a distance (d) apart, is defined as:

F=\frac{kQ^2}{d^2}

Here k is the Coulomb constant. The charge on each object is doubled, that is Q'=2Q:

F'=\frac{kQ'^2}{d^2}\\F'=\frac{k(2Q)^2}{d^2}\\F'=4\frac{kQ^2}{d^2}\\F'=4F

5 0
4 years ago
Bicycle in its writers have combined a mass of 80 kg in a speed of 6.0 meters per Second what is the magnitude of the average fo
erik [133]

Answer:

F = 120 N

Explanation:

Force x distance = energy

The bike has energy 1/2 . 80 . 6^2   = 1440 J

You are looking at an example of not reading the question properly.

Impulse = Force . time  = change in momentum

F . 4  = 80 .6

F = 120 N

7 0
3 years ago
How does the search for exoplanets help us describe how science requires creativity?
Aliun [14]

Answer:

As the planets are very small and dark in comparison with stars, it makes them very hard to be found from earth.

Explanation:

Astronomy, of course, has a solution for this. As astronomers can't observe planets directly, they decided to observe the stars and search for the effects that planets have on them.

There are many ways of observing the exoplanets: Radial Velocity, Transit Photometry, Microlensing, Astrometry, Direct Imaging, etc.

Before all of this, scientist had to find ways to prove their theories. Most of their time they have spent in giving the creative answers.

Science and creativity are very much connected when we speak about the development of science. Rationality and creativity always go together.

In order to create an idea that other people will consider useful, it is important to use creativity. As no one has the exact answer when it comes to science, the adventure is to research the unknown.

5 0
3 years ago
Other questions:
  • Look at the diagram. Emily needs to complete the circuit. What two points should be connected to complete the circuit and make t
    6·2 answers
  • A weight lifter is trying to lift a 1500-N weight but can apply a force of only 1200 N on the weight. One of his friends helps h
    10·1 answer
  • Which geologic feature most likely be represented by contour lines drawn far apart from one another?
    11·1 answer
  • If the end points are -8 and 12 what is the midpoint
    10·1 answer
  • Psychologists working from the biological perspective are interested in the __________. A. internal conflicts that affect behavi
    7·2 answers
  • If you are transported to a planet that has the same mass as Earth, but is larger in size, how would this affect your weight whe
    5·1 answer
  • 1. Who is Nancy Lieberman?
    12·1 answer
  • A flatbed truck is supported by its four drive wheels, and is moving with an acceleration of 7.4 m/s2. For what value of the coe
    14·1 answer
  • 13. Students are investigating how mass affects the force needed to move an
    12·1 answer
  • 7. Navy use SONAR method to locate the position of submarine under water. The waves used in SONAR are A transverse waves. B elec
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!