Answer:
Explanation:
To find the force between the two charges, we required the charges on each object and the distance between the two objects.
In the question, the distance between two charges is not given so we cannot find the charge on each sphere.
If the force is attractive, then the charges are opposite in nature and if the force is repulsive then the charges are same in nature.
Answer:
b
Explanation:
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Answer:
$900
Explanation:
Step 1: Our output value is 9000.
Step 2: We represent the unknown value with x.
Step 3: From step 1 above,$9000=100\%$
Step 4: Similarly, x=10%
Step 5: This results in a pair of simple equations:
$9000=100
Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both
equations have the same unit (%); we have
\frac{9000}{x}=\frac{100\%}{10\%}
Step 7: Again, the reciprocal of both sides gives
\frac{x}{9000}=\frac{10}{100}$
\Rightarrow x=900$
Therefore, $10\%$ of $9000$ is $900$
Answer:
The refractive index of the material is 1.28.
Explanation:
It is given that,
Refractive index of medium 1, n₁ = 1.31
Critical angle, 
At critical angle rays will reflects at 90 degrees. Using Snell's law as:
At critical angle, 
So, the refractive index of the material is 1.28. Hence, this is the required solution.
F=M×A
F=3 ×15
F=45N
so the force is 45 N
