You, travelling in a train at half the speed of light, and a friend, standing on the platform, both make measurements of your surroundings. (Like Einstein, we will blithely pass over how the train came to be travelling at this speed.)a You both decide to measure the length of the platform. What is the easiest way for your friend to do this? How can you do this?b If your friend measures the length of the platform to be 20 m, what do you measure it to be? Which one of you is measuring a proper length?c A previously unknown species of bird flies by you (in the same direction as the train is moving). If your friend measures its speed to be 0.75c, what do you measure its speed to be?
Physics
How to place an order?
Take a few steps to place an order on our site:
- Fill out the form and state the deadline.
- Calculate the price of your order and pay for it with your credit card.
- When the order is placed, we select a suitable writer to complete it based on your requirements.
- Stay in contact with the writer and discuss vital details of research.
- Download a preview of the research paper. Satisfied with the outcome? Press “Approve.”
Feel secure when using our service
It's important for every customer to feel safe. Thus, at Your homework help service, we take care of your security.
Financial security You can safely pay for your order using secure payment systems.
Personal security Any personal information about our customers is private. No other person can get access to it.
Academic security To deliver no-plagiarism samples, we use a specially-designed software to check every finished paper.
Web security This website is protected from illegal breaks. We constantly update our privacy management.
Get assistance with placing your order. Clarify any questions about our services. Contact our support team. They are available 24\7.
Still thinking about where to hire experienced authors and how to boost your grades? Place your order on our website and get help with any paper you need. We’ll meet your expectations.