A. Compound
b. Element
c. Mixture
Please brainlist me
As the room becomes warmer, the temperature of the thermistor will increase as well. The resistance of thermistors reduces when their temperature increases; thus, the current to the motor will increase and the fan will run faster when temperature is increased.
The total energy of the system remains the same.
Answer:
6.17 m
Explanation:
We are given that
Initial speed of rubber ball, u=12 m/s
Total height, h=7 m
Initial speed of second ball, u'=0
We have to find the height at which the two balls collide.
Let first rubber ball and second ball strikes after t time.
For first ball
Distance traveled by first ball in time t
![S=ut-\frac{1}{2}gt^2](https://tex.z-dn.net/?f=S%3Dut-%5Cfrac%7B1%7D%7B2%7Dgt%5E2)
Substitute the value
![S=12t-\frac{1}{2}(9.8)t^2](https://tex.z-dn.net/?f=S%3D12t-%5Cfrac%7B1%7D%7B2%7D%289.8%29t%5E2)
...(1)
Distance traveled by second ball in time t
![7-S=\frac{1}{2}(9.8)t^2](https://tex.z-dn.net/?f=7-S%3D%5Cfrac%7B1%7D%7B2%7D%289.8%29t%5E2)
.....(2)
Using equation (2) in equation (1) we get
![S=12t-(7-S)](https://tex.z-dn.net/?f=S%3D12t-%287-S%29)
![S=12t-7+S](https://tex.z-dn.net/?f=S%3D12t-7%2BS)
![\implies 12t=7](https://tex.z-dn.net/?f=%5Cimplies%2012t%3D7)
sec
Now, using the value of t
![S=12(\frac{12}{7})-4.9(\frac{12}{7})^2](https://tex.z-dn.net/?f=S%3D12%28%5Cfrac%7B12%7D%7B7%7D%29-4.9%28%5Cfrac%7B12%7D%7B7%7D%29%5E2)
S=6.17 m
Hence, at height 6.17 m the two balls collide .