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Q: What Under Pennsylvania law a competent observer must be on board when a person is being towed behind a vessel. Which of these describes a competent observer?
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The Doppler effect says that if v0 is greater then vs then an observer will hear a higher pitch in front of source does that mean if vs is greater v0 an observer will hear a higher pitch BEHIND source?

Yes. vs > v0 and you're behind the source means you're catching up to it. Only the relative motion matters for the Doppler effect. Even though you're behind the source and it's moving away from you in absolute terms, you're moving toward it in relative terms.

An observer stands 26m behind a marksman practicing at a rifle range The marksman fires the rifle horizontally the speed of the bullet is 790 ms air temperature is 20C How far does each rilfe travel?

There is only one rifle described in the question and it travels 0 m. nice try. The whole question is shown below: An observer stands 26 m behind a marksman practicing at a rifle range. The marksman fires the rifle horizontally, the speed of the bullets is 790 m/s, and the air temperature is 20°C. How far does each bullet travel before the observer hears the report of the rifle? Assume that the bullets encounter no obstacles during this interval, and ignore both air resistance and the vertical component of the bullets' motion.

What is the motivation behind the inventions of albert Einstein?

motivation behind the invention

What is the science behind hair straighteners?

i need to know the science behind hair straighteners.

What is the science behind the resource type of energy?

what is the science behind this resource/type of energy

Related questions

How does the frequency measured in front of the source appear to the observer compared to the frequency measured from behind?

The frequencies are the same, unless the source is moving relative to the observer.

Does the Doppler Effect mean that an observer ahead of a train hears the train at a higher frequency sound than an observer behind the train?

Yes that is the case.

What is legal when towing a person on water skis or similar device behind a vessel?

being towed behind a PWC with an operator and an observer on board

What is Pennsylvania's time compared with Greenwich England?

Pennsylvania is 5 hours behind Greenwich.

Is pennsylvania ahead or behind time in phoenix?


What is required when a skier is being towed behind a motorboat or PWC?

an observer or a wide-angle rearview mirror

What BEST describes the concept behind Web 2.0?

Which of the following BEST describes the concept behind Web 2.0? Download Write Read-write Upload

What is the time difference between Pennsylvania and iceland Please include whether Iceland is hours behind or ahead of Pennsylvania.?

Ice land is behind pennsylvnia in time, and all the hot girls go to pennsylvania. And there are topless beaches and lots of strip clubs.

Is Kankakee Illinois one hour behind Pennsylvania time?


How to calculate apparent frequency the source is ahead and observer is behind both moving the same direction?

The apparent frequency does not depend on who is in front.

What state has the worst school system?

I say Pennsylvania because their really behind

Is Pennsylvania the second state of America?

Yes, right behind Delaware.