Albert Einstein Facts, Quotes, Relativity Theory, Science Information Albert Einstein was born on the 14th of March 1879 and died on the 18th of April 1955. Born in Germany to a Jewish family, Einstein made many contributions to the field of theoretical physics. Even when very young, Einstein showed great ability in both math’s and science. He was naturally curious and had a brilliant analytical mind. Einstein worked in a patent office evaluating patents for electromagnetic devices not long after he graduated. He produced perhaps one of the most famous equations ever: E = mc² (energy equals mass multiplied by the speed of light squared).
Determining the Net Force If you have been reading through Lessons 1 and 2, then Newton's first law of motion ought to be thoroughly understood. An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In the statement of Newton's first law, the unbalanced force refers to that force that does not become completely balanced (or canceled) by the other individual forces. If either all the vertical forces (up and down) do not cancel each other and/or all horizontal forces do not cancel each other, then an unbalanced force exists. The existence of an unbalanced force for a given situation can be quickly realized by looking at the free-body diagram for that situation. In each of the above situations, there is an unbalanced force. Observe in the diagram above that a downward vector will provide a partial or full cancellation of an upward vector. A Net Force Causes an Acceleration Check Your Understanding
Peppered Moth Simulation Name:______________________________________________ Objective: Simulate changes in moth population due to pollution and predation, and observe how species can change over time. Introduction: Charles Darwin accumulated a tremendous collection of facts to support the theory of evolution by natural selection. One of his difficulties in demonstrating the theory, however, was the lack of an example of evolution over a short period of time, which could be observed as it was taking place in nature. The economic changes known as the industrial revolution began in the middle of the eighteenth century. Instructions: Click the link below to read more information on Kettlewell's study of moths. After 5 minutes record the % of dark moths and light moths - you will need this information later. Peppered Moth Simulation at peppermoths.weebly.com Data and Analysis Read the background information and answer the questions as you go. Life Cycle of the Peppered Moth 1. 2. 3. 4. 5. 6. Impact of Pollution 7. 8. 9.
Kids - Albert Einstein Biography Albert Einstein was born as the first child of the Jewish couple Hermann and Pauline Einstein, nee Koch, in Ulm on March 14, 1879. When Albert’s grandmother saw him for the first time she is said to have cried continuously: "Much too thick! Much too thick!" But despite all fear the development of young Albert was a normal one. A short time later the Einstein family went to Munich where Albert first attended elementary school and subsequently Luitpold grammar school. He moved to Bern and was given work at the Patent Office. Einstein’s famous formula: In this mathematical equation, E stands for energy, m for mass and c for the speed of the light in a vacuum (ca. 300,000 km/s). In 1903 he married his college mate Mileva Maric. After Einstein had separated from his wife Mileva he married his cousin Elsa Löwenthal in 1919. Through the political situation in Nazi Germany Einstein left the country in December 1932 and never again entered German ground.
The Meaning of Force A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction. Contact versus Action-at-a-Distance Forces For simplicity sake, all forces (interactions) between objects can be placed into two broad categories: contact forces, and forces resulting from action-at-a-distance Contact forces are those types of forces that result when the two interacting objects are perceived to be physically contacting each other. Action-at-a-distance forces are those types of forces that result even when the two interacting objects are not in physical contact with each other, yet are able to exert a push or pull despite their physical separation. Examples of contact and action-at-distance forces are listed in the table below. The Newton
KidWings Thomas Edison Facts for KidsEasy Science For Kids Do you love your cell phone? How about movies or your digital camera? Thomas Edison invented early versions of these modern marvels. He also invented the electric light bulb. All About Thomas Edison: He was born in 1847 in Ohio. Edison’s inventions and improvements on already invented equipment let people live more comfortably. He invented the electric light bulb. He was a busy, curious boy who got into trouble at school. Edison was born in 1847 in Ohio. This is the most famous quote of Edison. Thomas Edison Vocabulary Telegraph: early communication device that used Morse code, which was brief sounds or signalsPhonograph: early record playerAddled: slow, not smartInventor: someone who invents things Learn More All About Thomas Edison and His Great Inventions Watch this historical video all about Thomas Edison: A video of a short biography about Thomas Edison. Thomas Edison Q&A Question: How many things did Edison invent? Enjoyed the Easy Science for Kids Website all about Thomas Edison info?
Drawing Free-Body Diagrams Free-body diagrams are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation. A free-body diagram is a special example of the vector diagrams that were discussed in an earlier unit. These diagrams will be used throughout our study of physics. The size of the arrow in a free-body diagram reflects the magnitude of the force. The free-body diagram above depicts four forces acting upon the object. Practice Apply the method described in the paragraph above to construct free-body diagrams for the various situations described below. A book is at rest on a tabletop. Answers Answers to the above exercise are shown here. 1. Return to Questions Return to Info on Free-body diagrams Return to on-line Force Description List 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.