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Setler [38]
3 years ago
7

There are three ways to give an object a static charge. They are friction, conduction and induction. Two pieces of cellophane ta

pe are stuck to a lab table. Each piece is quickly ripped off the table. What prediction would you make about what happens when the two pieces of tape are brought near one another?
A) Nothing will happen. The tape only sticks when you touch the adhesive.
B) The two pieces of tape will repel as both have obtained a static charge.
C) The two pieces of tape will attract as both have obtained a static charge.
D) The two piece will cling to each other as a sock clings when it is removed from a clothes dryer.
Chemistry
2 answers:
BartSMP [9]3 years ago
8 0

Answer:

B) The two pieces of tape will repel as both have obtained a static charge.

Explanation:

The two pieces of tape will repel as both have obtained a static charge. Each piece of tape has obtain the same charge by the method of friction.

kotykmax [81]3 years ago
5 0

Answer:

b) The two pieces of tape will repel as both have obtained a static charge.

this is the right answer.

Explanation:

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The nose is an organ that acts as an airway for oxygen to enter the body. The nose also contains hairs that trap small foreign o
myrzilka [38]

A. The oxygen means it's a respiratory, and the hairs act to ensure no foreign contaminants make you sick.

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3 years ago
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Which solution has the lowest pH? A. 1.0 M HNO2 B. 1.0 M CH3COOH C. 1.0 M HCOOH D. 1.0 M HNO3 E. 1.0 M HPO4–
denpristay [2]
The parameter pH is a measure of the substance's acidity or basicity. It is quantitatively equal to the negative logarithm of the concentration of H+ ions. So, the lower the pH, the more acidic the substance, Otherwise, the higher the pH the more basic the substance. The pH range runs from 1 to 14, with 7 being neutral.

So, if we are asked to distinguish which of those have the lowest pH, we have to know the moles of H+ ions. Since all of them have a concentration of 0.1 M, concentration is not a factor. Thus, we just have to identify the strongest acid among the list. That is easy to answer because you only have to remember 7 strong acid occurring in nature: HCl, H₂SO₄, HNO₃, HClO₄, HClO₃, HBr, and HI. Since only HNO₃ is included in the list among the choices, the answer would be letter D. 
8 0
3 years ago
Name two methods scientists use to obtain empirical evidence
adell [148]
Through hypothesis and experiments
4 0
4 years ago
What parts of a divers body are most affected by pressure changes?
Yanka [14]
I would say the head and heart because if you swim deep in the ocean you will feel pressure in your heart and head because the muscles in your body are closing in on them

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5 0
3 years ago
The electrolysis of water has the equation 2H2O (l) → 2H2 (g) + O2 (g). What type of reaction is this?
Sonja [21]

<u>Answer:</u> The correct option is C) decomposition

<u>Explanation:</u>

Single displacement reaction is defined as the reaction where a more reactive element displaces a less reactive element from its salt solution.

AX+B\rightarrow BX+A

Element B is more reactive than element A

Double displacement reaction is defined as the reaction where an exchange of ions takes place in a solution

AX+BY\rightarrow AY+BX

Decomposition reaction is defined as the reaction where a single large chemical species breaks down into two or more smaller chemical species.

AB\rightarrow A+B

Synthesis reaction is defined as the reaction where two or more smaller chemical species combine together in their elemental state to form a single large chemical species.

A+B\rightarrow AB

For the given chemical reaction:

2H_2O(l)\rightarrow 2H_2(g)+O_2(g)

Here, water is breaking down into two smaller species of oxygen and hydrogen gas. Thus, it is a decomposition reaction.

Hence, the correct option is C) decomposition

4 0
3 years ago
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