Three wires of the same diameter and length are made from three different metals: copper (rho = 1.7 × 10–8 Ω·m), aluminum (rho = 2.7 × 10–8 Ω·m), and silver (rho = 1.6 × 10–8 Ω·m). Which wire has the least resistanc

Silver has least resistance

Explanation:

The given data :-

i) Since the diameter of each wire is same so the area of each wire is same i.e A₁ = A₂ = A₃.

ii) Length of each wire is same i.e L₁ = L₂ = L₃.

iii) Resistivity of copper ( ρ₁ ) = Ω.m

iv ) Resitivity of aluminum (  ρ₂ ) =   Ω.m

v ) Resitivity of silver ( ρ₃ ) = Ω.m

Resistance is given by

Since the area and length are same of all three wire so it becomes constant.

R ∝  ρ

So by observing the resistivity of all three wire.

ρ₃ <  ρ₁ <  ρ₂

Therefore  the wire silver has least resistance since it has least value of resistivity.

28. evolution

29. environment, survive, offspring  

explanation:

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2