Answer:
W = 100 J
Explanation:
The potential energy of an object is given by :
It is said to possessed by an object due to its position under the action of gravity.
The work done by an object is given by :
W = F×d , F is force and d is displacement
We know that, F = mg
So, if an object has 100 J of PE, it means that it can do the work of 100 J.
It’s D. The pitch would be lower. I’m 100% sure. I just took the test. I hope this helps you!! <3
For this conversion you should know that 1 meter has 1000 millimeters and that 1s equals 1000000 micro seconds, then:
7mm/us * 1m/1000mm * 1000000us/1s = 7000 m/s
The mm are canceled just like the micro seconds and the result remains in m / s .
Therefore option A is correct
A) 7000m / s
Explanation:
The following measures can be taken to prevent or control high temperature caused by thermal pollution:
1. Heated water from the industries can treated before discharging directly to the water bodies.
2. Heated water from the industries can be treated by the installation of cooling ponds and cooling towers.
3. Industrial treated water can be recycled for domestic use or industrial heating.
4. Through artificial lakes: In this lake Industries can discharge their used or heated water at one end and water for cooling purposes may be withdrawn from the other end. The heat is eventually dissipated through evaporation.
