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
pychu [463]
4 years ago
5

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

Chemistry
2 answers:
Licemer1 [7]4 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]4 years ago
7 0
It's because of the landscape, it changes over time.
You might be interested in
Which elements likely conduct electricity well ?
Vesnalui [34]

Answer:

Chromium, calcium, and osmium

Explanation:

These elements are metals, considering this, these elements electron shells(orbitals) are further away from the nucleus, with this, their attractions are not as strong as non-metals, so some of their electrons are able to move freely.

When you accumulate many atoms, these metals can form a "sea of electrons"  because they all have loose electrons interacting with each other. This allows easy conduction of heat and electricity.

7 0
3 years ago
Read 2 more answers
What part of ear caries electrical impulses to the brain?
tino4ka555 [31]
Optic Nerve,its connected to your brain from the back of your eye .
8 0
3 years ago
Read 2 more answers
Which of the following would occur in the liver when glucose levels are high (think insulin is elevated)?
love history [14]

Answer:

Option (C).

Explanation:

Insulin and glucagon are the important hormone that regulates the blood glucose level. The improper functioning of insulin can cause the diabetes in the individual organism.

The elevated level of insulin in blood causes the Generation of glucose 1-phosphate to maintain the blood glucose level. The glycogen synthesis is also used to bring down the blood glucose level to the normal level.

Thus, the correct answer is option (C).

5 0
4 years ago
What happens to the speed and acceleration when you let go
kvasek [131]
Imagine you are playing golf, and you’ve just set up the golf ball on the tee. You test your grip, take a few practice swings, and peer into the distance at the flag pole marking the first hole for the course. Your wise golf ball guru (who happens to also teach physics) tells you to “Be the ball, young grasshopper.” So you close your eyes and picture the distance the ball must travel. “Yes, young earthworm”, your sensei says, “that distance you see is the displacement you must achieve, displacement is the change in position from one place to another.”
You meditate on this nugget of wisdom, and you start to feel like you and the golf ball are one. But the hole still seems so far away: “How do I change the position of the ball, sensei?
Your sensei replies: “Ahh, the ball cannot simply teleport instantly, it requires velocity; you must change the position of the ball over time.”
In a brilliant burst of enlightenment, you know what you must do. The golf ball sits there minding its own business; with a velocity of 0, and it doesn’t have any plans on moving anytime soon until… WHACK! You hit that golf ball with your club and the ball goes flying through the air. Suddenly the ball is moving, and fast! You know you’ve made your sensei proud, the ball is being displaced, sailing from one position to another toward the hole, This change in position as time passes is what we call velocity.
3 0
4 years ago
H2 how many elements?
rjkz [21]
There are two elements, two hydrogen to be exact.
4 0
3 years ago
Other questions:
  • Help please!!!!!! Need answer!
    6·2 answers
  • Symbol for sulfur uranium and phosphorus
    8·2 answers
  • Baking soda reacts with vinegar and forms a gas why is it chemical
    12·2 answers
  • Complete the passage to Distinguish between mechanical and electromagnetic waves.
    14·1 answer
  • PLEASE ANSWER FAST Which measurements gives the precision of the balance shown above?
    5·2 answers
  • Forensic toxicology involves not only the area of toxicology, but also the use of areas such as analytic chemistry and pharmacol
    7·2 answers
  • Can some one answer my questions plz
    15·1 answer
  • Which of the following was not a part of dalton's atomic theory?
    9·1 answer
  • Please answer the question
    15·1 answer
  • 3HCl(aq) + Al(OH)3(aq) = AIC13(aq) + 3H2O(1)
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!