Answer:
resistor R₂ has the lowest current density
Explanation:
The current density is
j = I / A
now let's analyze each case
a) R₂ has an area 2A₀ and a length L₀ that R₁
b) R₃ has an area Ao and a length 3L₀ what R₁
we can see that all the area is given in relation to the resistance R₁
the current density in R₁ is
j₁ = I / A₀
the current density in R₂
j₂ = I / 2A₀
j₂ 2 = ½ I/A₀
the current density in R₃
j₃ = I / A₀
j₂ < j₁ = j₃
therefore resistor R₂ has the lowest current density
Answer:
F = 11046 N
Explanation:
given,
mass of the baseball (m)= 145 g = 0.145 Kg
horizontal speed(u) = -36 m/s
ball hit is straight back(v) = 47.8 m/s
time of contact = ?
using formula of impulse
Impulse = change in momentum
I = m v - m u
I = 0.145 x (47.8 - (-36))
I = 0.145 x (83.8)
I = 12.151 kg.m/s
we also know
I = F x t
now,
F x t = 12.151 kg.m/s
F x 1.1 ms = 12.151
F = 11046 N
Ahhh...Net Force.
Net force is simply the overall force acting on an object. Basically, All of the *un*balanced forces acting on that particular object. The Balanced forces cancel each other because they are balanced.
Streams of glowing gas that shoot out from the sun is called Prominence. It is a loop of incandescent, cool gas that extends way above the sun's edge can be viewed from Earth. These streams usually follow the magnetic field lines that are curved from an area of on magnetic polarity to an area of the opposite magnetic polarity. These streams can last for hour or even weeks.
Answer:
E=0.848
Explanation:
Given that
q= (94-p)²
where p is the price per case of tissues and q is the demand in weekly sales
As we know that price elasticity of demand given as
q= (94-p)²
When p = $28
E=0.848