Ian walks 2 km to his best friend’s house, then walks 0.5 km to the library. He then makes a 2.5 km walk home. The entire walk t
1 answer:
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Answer:
Part A:
Part B:
Explanation:
Part A:
To calculate the number of free electrons n we use the following formula::
n=1.5N-Au
Where N-Au is number of gold atoms per cubic meter
So:
Part B:
n is calculated above which is 8.85*10^{28}m^{-3}
Charge on electron=1.602*10^{-19}
Elec- Conductivity= 4.3*10^{7}
Answer:
1.97*10⁴N .He cannot survive.
Explanation:
The<em> </em><em>Tidal force</em> can be defined as the difference in force between center of two bodies like center of earth and other bodies.This force stretches the body too and fro from the center of mass of another body due to the difference in the gravitational force.
The tidal force is responsible for various phenomena like ocean tides,celestial body tearing up.
The tidal force is the effect of massive body gravitationally affecting another body.
The tidal force is the difference between the gravitational force of two bodies and directly proportional to the mass of body affecting another body and inversely proportional to the square of radius of the distance between center and the object.
Here let us consider height of person as 2m and d=1m
ΔF= -
=GMm[-
]
=(6.67*10⁻¹¹)(1.99*10³⁰)(1.0)[-
}
ΔF=1.97*10⁴N.
Thus he cannot survive
Explanation:
It is given that,
Length of the copper wire, l = 4.4 m
Diameter of copper wire, d = 1.3 mm = 0.0013 m
Radius of copper wire, r = 0.00065 m
The resistivity of the copper wire,
We need to find the resistance of the copper wire. It is given by :
R =0.055 ohms
So, the resistance of the copper wire is 0.055 ohms. Hence, this is the required solution.