As an element is a pure substance which contains only one kind of atoms ,so nitrogen -N2,contains only one kind of atom which is nitrogen of two atoms. And compound is also a pure substance which contains two or more kind of atoms. ... So,nitrogen is an element not an compound.
Answer:
![a = 0.1137 m/s^2](https://tex.z-dn.net/?f=a%20%3D%200.1137%20m%2Fs%5E2)
Explanation:
Let Vc be the velocity of the car and Vm the velocity of the motorcycle. If we convert their given values, we get:
Vc = 87 km/h * 1000m / 1km * 1h / 3600s = 24.17m/s
Vm = 95 km/h * 1000m / 1km * 1h / 3600s = 26.38m/s
Since their positions are equal after 17s we can stablish that:
![Xc = d + Vc*t = Xm = Vm*t + \frac{a*t^2}{2}](https://tex.z-dn.net/?f=Xc%20%3D%20d%20%2B%20Vc%2At%20%20%3D%20Xm%20%3D%20Vm%2At%20%2B%20%5Cfrac%7Ba%2At%5E2%7D%7B2%7D)
Where d is the initial separation distance of 54m. Solving for a, we get:
Repacing the values:
![a = 0.1137 m/s^2](https://tex.z-dn.net/?f=a%20%3D%200.1137%20m%2Fs%5E2)
To solve this, we are going to use the formula for the kinetic energy of an object:
![E_{k}= \frac{1}{2} mv^2](https://tex.z-dn.net/?f=E_%7Bk%7D%3D%20%5Cfrac%7B1%7D%7B2%7D%20mv%5E2)
where
![E_{k}](https://tex.z-dn.net/?f=E_%7Bk%7D)
is the kinetic energy of the object.
![m](https://tex.z-dn.net/?f=m)
is the mass of the object.
![v](https://tex.z-dn.net/?f=v)
is the speed of the object.
We know form our problem that the mass of the horse is 500 kilograms, so
![m=500](https://tex.z-dn.net/?f=m%3D500)
; we also know that the speed of the horse is 5 meter/second, so
![m=5](https://tex.z-dn.net/?f=m%3D5)
. Lets replace those values in our formula to find
![E_{k}](https://tex.z-dn.net/?f=E_%7Bk%7D)
:
![E_{k}= \frac{1}{2} mv^2](https://tex.z-dn.net/?f=E_%7Bk%7D%3D%20%5Cfrac%7B1%7D%7B2%7D%20mv%5E2)
![E_{k}= \frac{1}{2} (500)(5)^2](https://tex.z-dn.net/?f=E_%7Bk%7D%3D%20%5Cfrac%7B1%7D%7B2%7D%20%28500%29%285%29%5E2)
![E_{k}= \frac{1}{2} (500)(25)](https://tex.z-dn.net/?f=E_%7Bk%7D%3D%20%5Cfrac%7B1%7D%7B2%7D%20%28500%29%2825%29)
![E_{k}= \frac{12500}{2}](https://tex.z-dn.net/?f=E_%7Bk%7D%3D%20%5Cfrac%7B12500%7D%7B2%7D%20)
![E_{k}=6250](https://tex.z-dn.net/?f=E_%7Bk%7D%3D6250)
J
We can conclude that the kinetic energy of the horse is
6250 Joules.
Using the graph, which describes how Henry ran the 100m race;
a) It takes Henry 20seconds to run 100m
b) Henry's average speed over the race is; 5m/s.
According to the linear graph which describes the distance ran by Henry during the 100m race as a function of time.
a) Since the distance from start ran by Henry is plotted on the vertical axis, and the time is plotted on the horizontal axis;
To determine how long it took Henry to run 100m; The point corresponding to 100m is traced downward from the line of the graph and we find out that;
It takes Henry 20seconds to run 100m
b) Henry's average speed over the race is simply;
The slope of the distance-time graph.
Therefore,
- Average speed = (100-0)/(20-0)
Therefore, Henry's average speed over the race is; 5m/s.
Read more:
brainly.com/question/22125199