Home » Physics

Physics

There was once an episode of Lassie in which the dramatic conclusion found Timmy (or whatever was the name of Lassie’s boy-companion) stranded on an island in a river with flood waters rising rapidly. Of course, Lassie jumped into the raging torrent without a moment’s hesitation, swam across and struggled back with Timmy clinging grimly to her collar. After which they all went home for hot cocoa and dog biscuits, while we went to a commercial break. For this problem assume that the raging river is flowing with a speed of 10 m/s, that Lassie can swim (in still water) at a speed of 1 m/s and that the island is separated from the bank of the river by 10 m. a Not knowing anything about Galilean velocity transformations, Lassie points her nose at Timmy, directly across the river, and starts swimming. What direction does her velocity vector point as observed by Timmy’s parents, standing on the bank of the river? What direction does her velocity vector point as observed by a fish floating in the raging river? What are the two frames of reference and the object here? b How far down the island does Lassie end up if she swims blindly as described above? How long does it take her to cross the river? c Can Lassie swim at an angle to the current so that she ends up going straight across the river? What about Aquaman, who can swim at a speed of 20 m/s in still water? d How would the above problem differ if Lassie were a beam of light, emmitted by a flashlight, floating in the river. You don’t have to give a numerical answer for this problem, just discuss how the beam of light behaves differently than Lassie when transforming between reference frames.

Save Time On Research and Writing
Hire a Pro to Write You a 100% Plagiarism-Free Paper.
Get My Paper
Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more
Live Chat+1 763 309 4299EmailWhatsApp

We Can Handle your Online Class from as low as$100 per week