Two musicians are comparing their trombones. The first produces a tone that is known to be 438 Hz. When the two trombones play t
1 answer:
Answer:
It is producing either a 435-Hz sound or a 441-Hz sound.
Explanation:
When two sound of slightly different frequencies interfere constructively with each other, the resultant wave has a frequency (called beat frequency) which is equal to the absolute value of the difference between the individual frequencies:
(1)
In this problem, we know that:
- The frequency of the first trombone is
- 6 beats are heard every 2 seconds, so the beat frequency is
If we insert this data into eq.(1), we have two possible solutions for the frequency of the second trombone:
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Answer:
The force of repulsion between the two balls will increase
Explanation:
The electrostatic force between two charged objects is given by
where
k is the Coulomb's constant
q1 and q2 are the charges of the two objects
r is the distance between the centres of the two objects
We see that the magnitude of the force is directly proportional to the charges on the two objects. in this problem, we have two positively charged balls (so, there is a force of repulsion between them, since like charges repel each other and unlike charges attract each other), and the positive charge in one of them is slowly increased: this means that either or
in the formula is increasing, and so the magnitude of the force is increasing.
Answer:
Series equivalent resistance:
Parallel equivalent resistance:
Explanation:
The equivalent resistance in series circuit is calculated as
The equivalent resistance in parallel circuit is calculated as
Which can be simplified to
The parallel circuit has the higher equivalent resistance as compared to series circuit.