<u>Answer:</u> The mass of sulfur hexafluoride is 146 u.
<u>Explanation:</u>
Mass of a mole of a substance is defined as the molar mass of that substance.
It is defined as the sum of every component each multiplied by the times they appear in that substance.
We are given:
Mass of sulfur atom = 32.0 u
Mass of fluorine atom = 19.0 u
The chemical formula for sulfur hexafluoride is
So, the molar mass of
Hence, the mass of sulfur hexafluoride is 146 u.
displacement is given by equation
now at t = 5 s the position is
similarly position at t = 9 s
so the displacement of object in given interval of time will be
time interval
now the average velocity will be given as
so its average speed is 252 m/s
Answer:
vf = 3.27[m/s]
Explanation:
In order to solve this problem we must analyze each body individually and find the respective equations. The free body diagram of each body (box and bucket) should be made, in the attached image we can see the free body diagrams and the respective equations.
With the first free body diagram, we determine that the tension T should be equal to the product of the mass of the box by the acceleration of this.
With the second free body diagram we determine another equation that relates the tension to the acceleration of the bucket and the mass of the bucket.
Then we equalize the two stress equations and we can clear the acceleration.
a = 3.58 [m/s^2]
As we know that the bucket descends 1.5 [m], this same distance is traveled by the box, as they are connected by the same rope.
And the speed can be calculated as follows:
