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pychu [463]
3 years ago
5

Why do most sidewalks have cracks in them every few feet?

Chemistry
2 answers:
Licemer1 [7]3 years ago
8 0
This is actually a really good question! The lines are actually called "contraction joints." When the sidewalk is being made, the concrete used shrinks as it dries. This shrinking can cause cracks to form in the sidewalk, so to prevent the cracks from forming randomly, the builders make thin lines. Any cracks that form should follow the path of the line, since this is where the concrete is thinnest.

Hope this helps! :)
Elodia [21]3 years ago
7 0
It's because of the landscape, it changes over time.
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Tems11 [23]

Answer:

C. As speed increases, kinetic energy increase exponentially

Explanation:

As you can see on the graph, the further right we move on the x-axis, the higher the values on the y-axis. This means that as one value increases, the other value also increases. The only answer choice that says this is C.

Hope this helps :)

4 0
2 years ago
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What are the three conditions that can cause a chemicl reactions, give examples?<br> Help me plz
finlep [7]
Acid. that’s all i know.
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If an atom contains more electrons than protons, it is a action, an anion, or electrically neutral
barxatty [35]
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The answer is anion. Here's a way to help remember:

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3 years ago
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Strike441 [17]
5 divided by 2.7 is 0.54
3 0
2 years ago
Explain how each property affects the energy in a wave:
umka21 [38]

Answer:Amplitude:the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.Wave speed:Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known.Wavelength:Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire. In wireless systems, this length is usually specified in meters (m), centimeters (cm) or millimeters (mm).Frequency:frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.

Explanation:

8 0
2 years ago
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