CHEMISTRY HIGH SCHOOL

What is a physical change

Answers

Answer 1
Answer: A change that one can see with the eye. Such as a new hairstyle or a growth over the years.
Answer 2
Answer:

Hello there!

Explanation:

↓↓↓↓↓↓↓↓↓↓↓

Physical Change is a substance it does not change. Arrangement of molecules changes.

  1. Solid
  2. Liquid
  3. Gas

Hope this helps!

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-Charlie

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Which of the following is not a type of adaptation? A. Functional B. Mechanical C. Behavioral D. Structural

Answers

B. Mechanical-  is NOT a type of adaptation

Most ionic substances are soluble in water because water molecules are?

Answers

There exists the same question that has the following choices.

(1)nonpolar 
(2)inorganic 
(3)ionic 
(4)polar 

The correct answer is (4) polar. Water itself is polar. Ionic compounds are very polar, that is, one part is positively charged, the other negatively charged.

What part of the food chain is a zebra? Is it a producer, consumer, carnivore, herbivore, or omnivore?Thank you!

Answers

a zebra would be a herbivore as well as a primary consumer
consumer, herbivore.
hope that this helps you =)

What is added within the Shielded Twisted Pair Cable (STP) to reduce the incident of crosstalk?

Answers

Answer:

Shielded Twisted Pair (STP) cable includes an additional layer of shielding to reduce the incidence of crosstalk, which is electromagnetic interference or signal bleed between adjacent pairs of twisted cables. This shielding is usually made of metal foil or braided wire and is wrapped around the individual twisted pairs or the entire cable. Here are the key components added within STP to reduce crosstalk:

Explanation:

1.Shielding: STP cables have a metal shield that surrounds the twisted pairs or the entire cable. This shield acts as a barrier to block external electromagnetic interference (EMI) and also reduces the emission of electromagnetic interference from the cable itself.

2.Metal Foil or Braided Wire: The shielding material can be a thin metal foil or a braided wire mesh. These materials are highly conductive and capable of efficiently diverting and grounding any electromagnetic interference that may affect the cable.

3.Grounding: To be effective, the shield in STP cables needs to be properly grounded at both ends of the cable. This grounding helps in dissipating any unwanted electrical noise or interference that is captured by the shield.

4.Aluminum or Mylar Tape: Sometimes, STP cables may also have an additional layer of aluminum or Mylar tape between the shield and the twisted pairs. This tape adds an extra level of protection against interference.

The shielding in STP cables significantly reduces crosstalk and makes them suitable for environments where EMI is a concern, such as industrial settings or areas with a high concentration of electronic equipment. However, STP cables tend to be thicker and less flexible compared to Unshielded Twisted Pair (UTP) cables, which are more commonly used for standard Ethernet connections in office and home networks.

Final answer:

In a Shielded Twisted Pair Cable (STP), a shielding composed of an insulating material and a conductive layer is added. This shielding contains the electromagnetic fields within the cables thus reducing the incident of crosstalk.

Explanation:

In a Shielded Twisted Pair Cable (STP), a shielding is added to reduce the incident of crosstalk. This shielding is typically composed of an insulating material and a conductive layer, which is often made of metal foil or a braid. The shielding serves to contain the electromagnetic fields within the cables, protecting the internal wires from external influences, thereby significantly reducing the likelihood of crosstalk. For instance, in a network setting, shielding can help prevent data transmitted along one wire from being picked up by another, thus improving the quality of the transmitted signal. It's important to know that while shielding helps reduce crosstalk, it also makes the cable bulkier, and somewhat more difficult to install and manage compared to Unshielded Twisted Pair (UTP) cables.

Learn more about STP Cable Shielding here:

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a clerk can sort 7 papers/minute. if there are 225 papers in an inch, how many hours will it take her to sort 125 inches of loose apper

Answers

Well if there is 225 lose papers to a single inch in order to find out how many loose papers the clerk has all together we will have to multiply 125 x 225.

125 x225 = 28125

The clerk has to sort 28125 papers in total.

Now she can sort 7 papers in a minute so now we divide 28125 by 7.

28125/7 = a rough estimate of 4018 minutes

The clerk will take about 66 hours and 58 minutes

Or 67 hours if you want to estimate

Any temperature on the Kelvin scale can be changed to Celsius degrees bya. subtracting 100 from it.
b. adding 212 to it.
c. subtracting 273 from it.
d. subtracting 32 from it.

Answers

c. subtracting 273 from it.

C. Subtract 273 from it
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