Two charged objects, A and B, exert an electric force on each other. What happens if the distance between them is increased?
Answers
The correct answer to the question will be that the electric force between them will be decreased.
EXPLANATION:
Let us consider the charge contained by A and B are denoted as Q and Q' respectively.
Let R is the separation distance between them.
As per Coulomb's law in electrostatics, the force of attraction or repulsion between the two charge bodies A and B will be -
Coulombic force F =
Here, is the permittivity of the medium in which the charges are present.
From above, we see that electric force is inversely proportional to the square of separation distance between them.
Mathematically it can be written:
As per the question, the distance between A and B is increased.
Hence, the electric force between A and B will be decreased.
F= k * Q1*Q2 / r^2
where k is constant Q1, Q2-quantity of electricity and r- distance between two charged objects. So when you increase r, you divide with greater number and result decreases.
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how should the charge q be divided into two parts such that they experience maximum electrostatic repulsion
Answers
Answer:
[OH⁻] = 1 × 10⁻¹¹ mol/dm³
Explanation:
Since the hydronium ion concentration of the gastric fluid is [H₃O]⁺ = 1.0 × 10⁻².
The pH at this point is pH = -log₁₀[H₃O]⁺ = -log₁₀[1.0 × 10⁻²] = 2
When milk of magnesia is added, the pH increases by one unit, so the new pH is 1 + 2 = 3
Since pH + pOH = 14, then pOH = 14 - pH = 14 - 3 = 11
The hydroxide ion concentration of the fluid is gotten from
pOH = -log₁₀[OH⁻]
11 = -log₁₀[OH⁻]
-11 = log₁₀[OH⁻]
taking antilog
[OH⁻] = 1 × 10⁻¹¹ mol/dm³
Answer:
1 × 10^-11 units.
Explanation:
Given:
[H+] = 1 × 10^-2
pH = - log [H+]
= -log [1 × 10^-2]
= 2
The question further said, "which raises the ph of the fluid by one unit"
pH(new) = 2 + 1
= 3
pH + pOH = 14
pOH = 14 - 3
= 11
pOH = - log [OH-]
[OH-] = 10^-11
= 1 × 10^-11 units
Answers
Answer:Yes, A body can have constant speed but still accelerate as in case of uniform circular motion. In uniform circular motion speed remains constant and direction of velocity changes with every point in the direction of tangent drawn from that point.
Explaination:
Was this helpful
Answers
Answer:
8.70 seconds.
Explanation:
1. Use the kinematic equation: v = u + at,
v = final velocity
u = initial velocity
a = acceleration
t = time.
Find variables and numbers:
v = ?
u = 20 m/s
a = -2.3 m²
v = 0 m/s
Rearrange values: t = (v - u) / a.
Plugging in the values: t = (0 - 20) / (-2.3) = 20 / 2.3
Answers
Explanation:
Magnet has two poles: (1) North pole and (2) South pole.
Like poles repel each other. If the like poles are interacting each other then there will be force of repulsion in between these poles.
Unlike poles attract each other. If the unlike poles are interacting each other then there will be force of attraction in between these poles.
S-S and N-N magnetic poles repel each other.
show the average speed of something.
point in the same direction as the change in position.
require knowing the initial and final position, along with the elapsed time.
are everything you need to determine the displacement of something.
Answers
Answer:
point in the same direction as the change in position.
require knowing the initial and final position, along with the elapsed time.
Explanation:
As we know that average velocity is defined as the ratio of change in position and the time interval of the object
It is given as
so we will have
= displacement
= time interval
the direction is this average velocity is always along the direction of the displacement
so correct answer will be
point in the same direction as the change in position.
require knowing the initial and final position, along with the elapsed time.
B. Pass the solution through a filter to let the dissolved substance separate.
C. Use a magnet to draw out the solid substance from the water.
D. Pour the liquid along a rough surface that would catch the solid particles but not the water.
Answers
Boiling the water away, leaving the substance behind in the beaker is the way to separate the mixture. The correct option is A.
What is a mixture?
A mixture is basically a substances comprised of two or many distinct chemical substances which are indeed not linked covalently.
A mixture is the usually physicalcombination of two or more substances that retain their identities as well as are mixed in the way to form solutions, suspensions, along with colloids.
When two or more distinct substances are physically combined, a mixture is formed that can be distinguished back into its original substances.
When two or more substances combine to form a new substance that cannot be separated back into its original substances, a chemical reaction occurs.
The mixture can be separated by boiling the water away and leaving the substance in the beaker.
Thus, the correct option is A.
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Answer:
I think the answer is a because boiling water cleans it