When a guitar string is struck, a standing wave is produced that oscillates with a large sustained amplitude, pushing back and forth against the surrounding air to generate sound. How does the frequency of the resulting sound compare with the frequency of the standing wave in the string? 1. The frequencies of the resulting sound have nothing to do with those of the standing wave in the string. 2. The frequencies of the resulting sound are half of those of the standing wave in the string. 3. The frequencies of the sound and the oscillating string are the same. 4. The frequencies of the resulting sound are twice of those of the standing wave in the string.4

3) True. The box is built to amplify the frequencies ,

Explanation:

When the guitar string is played, a wave is produced along it with a wavelength given by the root of the relationship between the tension and the linear density of the string. This frequency moves the air that is in the vicinity and this air creates a wave that enters a soundboard, designed to amplify the waves of the string; therefore the frequencies of the string and the air are the same.

Let's check the answers

1) False. The soundboard is built to amplify the frequency of the string

2) False. They are equal

3) True. The box is built to amplify the frequencies

4) False. They are equal

elly's long hair:

a. if the salon only takes cash, then this isn't the problem. it doesn't matter how much she has in her checking account.   she can't get a haircut until she has the cash.

b. if she has overdraft protection, then there's no problem.   she can go ahead and write a check that her account can't cover, then sometime later, pay the bank some outrageous usury for loaning her a few bucks for a few days, but with beautiful hair.

c. if elly has some principles, and doesn't want to write a bad check, then now she has a problem.   her desire for the new hairstyle is in conflict with her honesty and integrity.

d.   if the bank will not process a check she writes, then even if she had a million $$ in her account, she couldn't use any of it.   the amount she has in her account is not the problem.   and if i may suggest, she might as well close her checking account, and put the money where it'll work for her.   it's not doing her a bit of good in a checking account, since she can't write any checks.

justin can't pay the full balance:

a. he can't even handle the credit limit he has now.   under no circumstances should he ask for a higher limit.

b.   he can ask for the grace period to be extended.   but that's no solution, the bank will almost certainly refuse anyway, and there are much better options.   he knew the rules of his credit card when he started using it.

c.   he definitely should pay the interest on the balance, plus as much of the balance as he can cover at the same time.

d.   he definitely should pay the minimum otherwise they could shut down his card.   he should also pay as much more as he possibly can.   he should also remember the awkward situation he's in, stop buying stuff on credit that he can't afford, and avoid adding any more debt.

i'd say that justin's best best option isn't on this list of choices.   what he has to do:   pay as much as he can at least the minimum payment plus as much more as he can and then avoid adding more debt.

the total distance traveled by the car is

30km + 49km = 79 km .