Escape velocity describes the speed necessary to escape the gravitational pull of a sun, planet or moon. Escape velocity can be determined once you know the sun, moon, or planet's mass, radius, and themass of both the...
Learn about expansion and contraction for elementary age kids and homeschool. Physical science for kids.
Burbars are the important elements in the electrical substation. Bus bars acts as nodal point in the substation which connects different incoming and outgoing circuits. Substations present in the power system performs...
Sound is a powerful energy source which impact us in many different ways. Every sound is a vibration made of waves oscillating at a particular frequency. Learn how we produce sound by speaking and singing.
Both of these are used frequently in astronomical work but the differences between them help us learn more about their sources.
Back in 2010, local and national media reported about sitings of a possible missile launch off the coast of Southern California. Or was it? An optical illusion may have fooled eye witnesses and media.
This is part 3 of a 6 part hands-on unit on Inventions and Simple Machines. Build and test waterwheels, use cylinders to make wheel cookies, experiment with matchbox cars to demonstrate friction, compare the mechanical...
Science had made our lives easier and more convenient because of it's advancement, inventions and innovations of different technologies.
Practice problems from Halliday, chapter 2.
Is light a wave? Does it consist of particles? Wave-packets? What if we assume, instead, that light has the configuration of a rope?