JoinAll Resources
Book Chapter
A low rumble through the Earth convulses a highway like a fish gasping for air. A child in a distant playground moves gracefully propelling the swin...
Book Chapter
Why do elephants have such big ears? And why do they have such thick legs? In other words, why do elephants have different shapes than horses? This ch...
Book Chapter
An interesting experiment to perform involves a helium balloon tied to the seat of a car. As the car accelerates forward, the helium balloon will lea...
Book Chapter
A very popular physics toy consists of two concave spherical mirrors facing each other like the shells of a clam. If a coin or button is placed on th...
Book Chapter
Merry Go-Rounds are the most egalitarian ride in that everybody can have a good time. As personal thrill tolerances increase, other rides are tried wh...
Book Chapter
Millions of dollars of research and experimentation have been invested in car designs to minimize the adverse effects of air resistance. And here is ...
Book Chapter
As a police cruiser drives by with its siren sounding, the pitch of the siren decreases. The same thing happens at the Indianapolis 500 as a race car ...
Book Chapter
He’s full of hot air! We all know what this expression means. In this chapter, students of physics take a more substantial look at hot air knowing t...
Book Chapter
Although faster-than-light travel is commonplace in science fiction, ordinary matter in the ordinary world must obey the laws of physics. The speed o...
Book Chapter
Michael Jordan makes it all look so easy. The ball gracefully glides in its arc and swishes through the net. All that polish from years of practice an...
Book Chapter
Have you ever taken your bathroom scales to an elevator for a ride? This is guaranteed to start an interesting conversation and you will be advancing ...
Book Chapter
The complexity of the human eye confounded Darwin. But his concept of adaptation and natural selection guided a steady stream of biologists who have ...
Book Chapter
We are all familiar with images formed by mirrors and lens. In fact, we often pay to see images produced in special ways. But what is an “image char...
Book Chapter
The technological products of the discovery of fission, notably the atomic bomb and nuclear power, have greatly elevated its importance in our cultur...
Book Chapter
One person described how the bedroom wall moved across the room. Another watched as a huge wave of concrete traveled along the highway. We all saw the...