Answer:
Explained
Explanation:
Resistance R in a current flow through an object is given by
ρ = resistivity of the material
L= length of the object
A= area of cross section
clearly resistance is directly dependent on length of the object.This means greater the length larger will be resistance to current.
thermal resistance R_th is given by
L= length of the object
A= area of cross section
K = Conductivity of the material
thermal resistance is also is directly dependent on length of the object.This means greater the length larger will be resistance to current.
We use the voltage division problem between the load resistance, amplifier output resistance as
.
Here, is the output voltage, is the amplifier voltage, is the load resistance and is the amplifier output resistance.
Therefore,
.
Thus, the amplifier output resistance is .
The answer would be false
With enough strength it can more than likely get ripped out. Most weaves are not secure on a persons hair, therefore with some strength it can be pulled off. But of-course the person wearing it will suffer damage
Let be the height of the building and thus the initial height of the ball. The ball's altitude at time is given by
where is the acceleration due to gravity.
The ball reaches the ground when after . Solve for :
so the building is about 16 m tall (keeping track of significant digits).