Answer:
The firefighter who holds the hose in the backward direction will experience greater force.
Explanation:
Lets take
mass flow rate = m
Inlet velocity = v₁
Exit velocity = v₂
When water leaves in the same direction ,then change in the linear momentum = m (v₂ - v₁)
And we know that change in the linear momentum is known as force.
F₁ =m (v₂ - v₁) ----------1
When water leaves in the opposite direction(U turn) ,then change in the linear momentum = m (v₂ +v₁)
F₂= m (v₂ +v₁) --------2
F₂ >F₁
There fore when water leaves in the U turn pipe will feel more force.
The firefighter who holds the hose in the backward direction will experience greater force.
The answer for the first question is 1) A letter Is to a word
And the answer for question 2 is C
Answer:
<u>The correct answer is 3 cm ³ (cubic centimeters)</u>
Explanation:
The concepts of volume and capacity are closely related. Let us not forget that Volume is the space that a body occupies and that Capacity is the empty space of one thing that is sufficient to contain another.
Therefore, between both terms there is an equivalence that is based on the fact that a container of a cubic decimeter has the capacity to contain a liter.
<u>1 dm³ = 1 l
</u>
The equivalence between these measures is not correlative because a unit of volume is 1,000 times greater than the immediate lower, while a unit of capacity is 10 times greater than the immediate lower. Thus,
<u>1 cm³ = 1 ml </u>
Hello! The correct answer is: His apparent weight will be greatest when the elevator is accelerating upwards.
I really hope this helped you! c: