which of the following would decrease current flow in a circuit made originally from 1.5 volt battery, a loop of wire and a swit
1 answer:
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(a) This is a freefall problem in disguise - when the ball returns to its original position, it will be going at the same speed but in the opposite direction. So the ball's final velocity is the negative of its initial velocity.
Recall that
We have , so that
(b) The speed of the ball at the start and at the end of the roll are the same 8 m/s, so the average speed is also 8 m/s.
(c) The ball's average velocity is 0. Average velocity is given by , and we know that
.
(d) The position of the ball at time
is given by
Take the starting position to be the origin, . Then after 6 seconds,
so the ball is 42 m away from where it started.
We're not asked to say in which direction it's moving at this point, but just out of curiosity we can determine that too:
Since the velocity is positive, the ball is still moving up the incline.
Answer:
The distance is
Explanation:
From the question we are told that
The distance from the conversation is
The intensity of the sound at your position is
The intensity at the sound at the new position is
Generally the intensity in decibel is is mathematically represented as
The intensity is also mathematically represented as
So
=>
From the logarithm definition
=>
=>
Here P is the power of the sound wave
and A is the cross-sectional area of the sound wave which is generally in spherical form
Now the power of the sound wave at the first position is mathematically represented as
Now the power of the sound wave at the second position is mathematically represented as
Generally power of the wave is constant at both positions so
substituting value