# Why do atoms have relatively the same size even though they may have widely different masses?

Physics Final Exam

Directions: It is important that you provide answers in your own words. Please focus only on information from the text/eBook to create your own solutions.  Please do not use direct information from an outside source (especially copying and pasting from an “answer” website). Use of direct information from an outside source is against school policy.  All answers will be checked for plagiarism. Instances of plagiarism can result in probation or possible dismissal from the school.
Grading: Please be sure to follow all guidelines (number of sentences/showing all calculations) and to provide the correct metric units of measure. All questions are 5 points. You MUST include units on all your answers.
For any math based questions you must show all your work and explain any numbers that are not clearly understood by the problem. There is a formula sheet for you to use at the end of the exam.

How is electric potential energy similar to gravitational potential energy? How is it different? Where will an electron bound in an atom and have the largest electrical potential energy?

What is a transformer? Explain how a transformer works including specific details on step up and step down transformers.

Write at least 4 to 5 sentences on the different measurements that helped to calculate the speed of light. There are 3 specific experiments mentioned in your textbook.

Three equal-sized holes are drilled at the top, middle, and bottom of the side of a barrel filled with water. Describe the path (which is NOT speed) of water coming from each hole. Explain why water from the bottom home comes out the fastest

What caused magnetic fields? What happens If you keep breaking a magnet in two until you reach a single atom?

What is an electric motor? Explain its operation.

State Hooke’s law. A spring will stretch 12 cm when a 250-g mass is hung on it. If the 250-g mass is hung on two identical springs, hung sided by side, and both support the 250-g mass, how much will each spring stretch. EXPLAIN.

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces. Please provide at least 2 examples.

Why do atoms have relatively the same size even though they may have widely different masses?

What is the period of a soundwave whose wavelength is 20.0 m? Use values from the book and show ALL of your work.

A 60-V potential different is applied across a parallel combination of a 10-ohm and 20-ohm resistor. What is the current in the 10-ohm resistor? Show your work.

What is the power dissipated by a toaster that has a resistance of 60 ohms and is plugged into a 120-V outlet? Show your work.