C because you don’t put a force of which you choose and the force wouldn’t be strong enough
The electron charge is called the Elementary Charge, given by:
The Eletrostatic Force bewteen two changes is giver by Coulomb Law:
Substituing the unknowns, we have:
If you notice any mistake in my english, please let me know, because i am not native.
Answer:
Answer = 3.16m
Explanation:
The concept applied here is the relationship between intensity and sound level. the intensity I of a sound wave is the average rate per unit area at which energy is transferred.
I = P/A
I = intensity
A = Area
The intensity of a sound wave can also be expressed in terms of the decibel scale. DB is the abbreviation for decibel which is the unit of sound level this was named after Alexander Graham bell whose work on this aspect was recognized.
The step by step calculation and necessary derivations is a shown in the attachment.
Answer:
Solution
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Correct option is
C
3 cm
RI=apparent depthreal depth
Substituting, 34=apparentdepth12
Therefore, apparent depth=412×3=9
The height by which it appears to be raised is 12−9=3cm
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SIMILAR QUESTIONS
A coin is placed at the bottom of a glass tumbler and then water is added. It appeared that the depth of the coin has been reduced because
Medium
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A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 up to the same height, by what distance would the microscope have to be moved to focus on the needle again?
Answer:
2.04m/s²
Explanation:
Complete Question
<em>A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object. Find the acceleration of the object.</em>
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According to Newtons second law;
\sum F_x = ma_x
F_m - F_f = ma_x
Fm is the applied force
Ff is the frictional force
m is the mass
a is the acceleration
Substitute the given values
40N - nmg = 10a
40 - 0.2(10)(9.8) = 10a
40 - 19.6 = 10a
20.4 = 10a
a = 20.4/10
a = 2.04m/s²
<em>Hence the acceleration of the object is 2.04m/s²</em>