Answer:
1380 kph west
Explanation:
The resultant velocity is the sum of airplane velocity with respect to air and the velocity of wind with respect to ground. Since these 2 vectors are in opposite direction (east vs west), we will take the 20 kph east as negative
1400 west + 20 east = 1400 west + (-20)west = 1380 kph west.
Low specific heat in the material
The biggest one is when we breathe from our nose and mouth
Speed = Starting speed + (time + acceleration)
Starting speed is 0, acceleration is 2 m/s, speed is 30
30 = 0 + 2t
t ( stands for time ) = 15
Answer:
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.