Sound wave A delivers 2J of energy in 2s. Sound wave length B delivers 10J of en

Question

Sound wave A delivers 2J of energy in 2s. Sound wave length B delivers 10J of energy in 5s. Sound wave C delivers 2mJ of energy in 1ms. Rank in order, from largest to smallest, the sound powers of Pa, Pb, Pc of these three waves.
Explain. What equation would you use to determine this? Sound wave A delivers 2J of energy in 2s. Sound wave length B delivers 10J of energy in 5s. Sound wave C delivers 2mJ of energy in 1ms. Rank in order, from largest to smallest, the sound powers of Pa, Pb, Pc of these three waves.
Explain. What equation would you use to determine this?
Explain. What equation would you use to determine this?

Explanation / Answer

using this formula, E = P x t

where, E = energy in Joule

P = power in watt

t = time taken in second

For Sound wave A :

Pa = E1 / t1    { eq.1 }

where, E1 = 2 J & t1 = 2 sec

Pa = (2 J) / (2 sec)

Pa = 1 W

For Sound wave B :

Pb = E2 / t2                            { eq.3 }

where, E2 = 10 J & t2 = 5 sec

Pb = (10 J) / (5 sec)

Pb = 2 W

For Sound wave C :

Pc = E3 / t3                           { eq.3 }

where, E3 = 2 mJ & t3 = 1 ms

Pc = (2 mJ) / (1 ms)

Pc = 2 W

Rank in order from largest to smallest, the sound powers of these three waves will be given as ::

Pc = Pb > Pa

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.