Answer:
14.2 m/s
Explanation:
Given data:
Speed of the stream, v₁ = 7.1 m/s
let the cross section area at initial point be A₁
now area at the second point, A₂ = (1/2)A₁ = 0.5A₁
now, from the continuity equation, we have
A₁v₁ = A₂v₂
where, v₂ is the velocity at the narrowed portion
thus, on substituting the values, we get
A₁ × 7.1 = 0.5A₁ × v₂
or
v₂ = 14.2 m/s
Ohms law = v= Ir
V= 0.02 x 4000 = 80v
They are right the answer is A true
Answer:
C
Explanation:
C. a system that converts thermal energy into other useful forms of energy
As momentum / time = force
so; time = 100÷15
so your answer is 6.7 !!
