Fnet=ma so m = fnet/a 100/5=20 the mass is 20
Pressure=hrg
pressure is great at the bottom because the weight lf water exerts pressure below the container due to the gravitational pull of the earth.
Answer:
- A vibrating object
- a medium to travel
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The sun is a clear example of objects releasing radiation in nature
Answer:
Rate of change of area will be 
Explanation:
We have given rate of change of radius 
Radius of the circular plate r = 52 cm
Area is given by 
So 
Puting the value of r and 

So rate of change of area will be 