The mass of 2 cm3 of gold is 38.6 grams. find the density of the gold. Could you please help me??
1 answer:
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Answer:
<h2>36cm from the surface</h2>Explanation:
Equation of refraction of a lens is expression according to the formula given below;
R is the radius of curvature of the convex refracting surface = 12cm
v is the image distance from the refracting surface
u is the object distance from the refracting surface
n₁ and n₂ are the refractive indices of air and the medium respectively
Given parameters
R = 12 cm
u = (since light incident is parallel to the axis)
n₁ = 1
n₂ = 1.5
Required
<em>focus point of the light that is incident and parallel to the central axis (v)</em>
<em />
Substituting this values into the given formula we will have;
Cross multiply
Hence Light incident parallel to the central axis is focused at a point 36cm from the surface
The magnitude of the electrostatic force between the two charges is
Explanation:
The magnitude of the electrostatic force between two charges is given by Coulomb's law:
where:
is the Coulomb's constant
are the two charges
r is the separation between the two charges
In this problem, we have:
r = 20.0 cm = 0.20 m
Therefore, the force between the charges is
where the negative sign means that the force is attractive, since the two charges have opposite sign.
Learn more about electrostatic force here:
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