This type of listening response is called back-channel signal. This allows the speaker to know that the listener is attentive or willing to engage a conversation between them. It is shown through short utterances, facial expressions, head nods and others.
<h3>
Answer: 1) Boils</h3>
The less air pushing down on the water effectively allows the water to boil easier. Think of the water molecules as a bunch of marbles bouncing around in a box with a lid. The less air pressure means the lid is easier to open from the force exerted by the bouncing marbles, allowing those particles to escape and turn into gas.
So in short, if you are in the mountains, then it'll take less time to cook food because water comes to a boil faster.
Answer:
<em>The second drop is 3.75 m above the ground</em>
Explanation:
<u>Free Fall Motion</u>
A free-falling object falls under the sole influence of gravity without air resistance.
If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is .
The distance traveled by a dropped object is:
If we know the height h from which the object was dropped, we can find the time it takes fo hit the ground:
When the first drop touches the ground there are two more drops in the air: the second drop still traveling, and the third drop just released from the tap.
The total time taken for the first drop to reach the ground is:
Half of this time has taken the second drop to fall:
It has fallen a distance of:
Thus its height is:
h = 5 - 1.25 = 3.75
The second drop is 3.75 m above the ground
Answer:
It must be moved by 2.59 m to the right
Explanation:
To keep the plank in uniform state, the moment at sawhorse = 0
Let y be the distance of saw horse from left of plank.
Weight per unit length of plank
Taking moment about saw horse
Moment due to left portion,
182 x y + 12.375 x y x 0.5 y = 182 y + 6.1875 y²
Moment due to right portion,
12.375 x (8-y) x 0.5 (8-y) = 396 + 6.1875 y² - 99y
So to keep balance these moments should be same
182 y + 6.1875 y² = 396 + 6.1875 y² - 99y
281 y = 396
y = 1.41 m
Distance moved to right = 0.5 x 8 - 1.41 = 2.59 m
So it must be moved by 2.59 m to the right