Answer:
Noise level will be -18.2 watt
So option (b) will be correct answer
Explanation:
We have given sound intensity
And threshold intensity ( in question it is given as
but its standard value is
)
Now noise level
So the noise level will be -18.2
So option (b) will be correct answer
Given:
m = 0.14 kg
v = 18 m/s
To find:
Kinetic energy= ?
Explanation:
Kinetic energy of the object is possessed when the object is in motion. It is define as the work done required to accelerate a body from rest to motion. Unit of energy is Joule and it is same as unit of work done. Energy is nothing but the capacity to do work.
Solution:
Kinetic energy of the ball is given by,
Kinetic energy =
m = 0.14 kg
v = 18 m/s
Kinetic energy =
Kinetic energy = 226.8 Joule
Answer:
Explanation:
V(x,y)=(x+6)i+(y-3)j ............eq1
As intial point are given (1,1)
which means x=1,y=1
put these values in eq1
V(1,1)=(1+6)i+(1-3)j
V(1,1)=7i-2j
And its magnitude given as
|V(1,1)|=
|V(1,1)| =7.28