Answer:C
Explanation:
Given
weight of object is equal to weight of object
Suppose weight of Planck is W
suppose weight is at distance of x cm from wedge
balancing Torque
![w\times x-w(\frac{L}{2}-x)=0](https://tex.z-dn.net/?f=w%5Ctimes%20x-w%28%5Cfrac%7BL%7D%7B2%7D-x%29%3D0)
![2x=\frac{L}{2}](https://tex.z-dn.net/?f=2x%3D%5Cfrac%7BL%7D%7B2%7D)
![x=\frac{L}{4}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7BL%7D%7B4%7D)
i.e. at a distance of 0.25L from the Left end
Answer:
The correct answer is the number 4. A wave on a pond is a mechanical wave which requires a medium to travel.
Explanation:
Mechanical waves are those that need a material medium to propagate. The waves of the sea and the waves that we produce on a guitar string, the sound, are examples of mechanical waves. Electromagnetic waves are energetic pulses capable of propagating in a vacuum. This way, a wave on a pond is a mechanical wave which requires a medium to travel.
Answer:
The answer is <em>Electric Motors</em> .
Explanation:
As <u>E</u><u>l</u><u>e</u><u>c</u><u>t</u><u>r</u><u>i</u><u>c</u><u> </u><u>m</u><u>o</u><u>t</u><u>o</u><u>r</u><u>s</u> take in electrical energy in order to operate it. So it change from electrical energy to kinetic emergy.