runnin reggie ran up a mountain from an elevation of 915 m to 4095 m in 62.25 min. If Reggie has a mass of 70 kg, how much power
1 answer:
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a) Density at 100 degrees:
Explanation:
The density of mercury at 0 degrees is
Let's take 1 kg of mercury. Its volume at 0 degrees is
The formula to calculate the volumetric expansion of the mercury is:
where
is the cubic expansivity of mercury
V is the initial volume
is the increase in temperature
In this part of the problem,
So, the expansion is
So, the new density is
b) Density at 22 degrees:
We can apply the same formula we used before, the only difference here is that the increase in temperature is
And the volumetric expansion is
So, the new density is
To solve this problem we will apply the concepts related to the Impulse which can be defined as the product between mass and the total change in velocity. That is to say
Here,
m = mass
Change in velocity
As we can see there are two types of velocity at the moment the object makes the impact,
the first would be the initial velocity perpendicular to the wall and the final velocity perpendicular to the wall.
That is to say,
El angulo dado es de 45° y la velocidad de 25, por tanto
The change of sign indicates a change in the direction of the object.
Therefore the impulse would be as
The negative sign indicates that the pulse is in the opposite direction of the initial velocity.
