Energy is loosely defined as the ability to do something. It is a very vague definition, but energy is a very vague concept. The two main types of energy are potential energy, energy that is stored, and kinetic energy, energy that is moving. Both are necessary for an object to bounce. When an object is held off the ground by a person, thing, etc., it has potential energy, gravitational potential energy to be specific. Gravitational potential energy is energy that is stored in an object when it is moved against gravity. For the sake of simplicity let's ignore all the different theories about gravity and just think of it as something that draws an object towards the Earth. When an object is lifted off the ground, it is going against gravity, so gravitational potential energy is stored in the object. When the object is released, the potential energy turns into kinetic energy as it moves towards the ground as a result of gravity. When the object hits the ground, it, the ground, or both are deformed. This deformation is called elastic potential energy. When the two things collide, they squish out of shape to hold the potential energy. Because nothing is holding the objects in their deformed shapes, they quickly release their elastic potential energy and revert to their original shapes. This changes the potential energy into kinetic energy and sends the objects back up off the ground. So in the end, objects bounce because of one simple law, energy cannot be created nor destroyed. (Unless you work with particle colliders)
Dr. Belinda Wilkes became Director of NASA’s Chandra X-ray Observatory in April of 2014. Read about her incredible list of achievements in the field of astronomy right here: http://chandra.si.edu/press/bios/belinda_bio.html
Astronomy Fact #24!
Dr. Belinda Wilkes is the first female Director of a NASA Great Observatory.
Celebrating #womeninscience #womenatnasa and #womenhistorymonth
- Universitatea de Stiinte Agricole si Medicina Veterinara BucurestiMaster of Science in Environmental Management in Agriculture
I have been fascinated by the stars ever since I can rememeber being alive. Then I found out that most of our great stories are linked to them one way or another, and life too ...
So I become a StarryTeller because I wanted to know why that was!
My technical expertise draws from the biological sciences field, I use that to support science education and dream of space. My wild rabbit has always been curiosity ...
If I could wish for the humankind, I wish that all people could follow their dreams. This is not a given yet but I choose hope, and my faith that telling our success stories makes the difference.
I also wish to share my belief that culture is merely a set of instructions handed down from our ancestors for generations, to ensure our best survival. That culture, shaped by geographical constraints is not a reason to start a war. I know that extinct is forever and I could see that progress can only be achieved if we share the knowledge.
More than anything I wish people could realise that we are really made of stardust.
- Ministry for Primary IndustriesSenior Adviser Information, 2012 - present
- Carter Observatory WellingtonPlanetarian, 2005 - 2014
- MAF BiosecuritySenior Adviser Information Risk Analysis, 2008 - 2012
- KiwiSpace FoundationEducation Coordinator, 2010 - 2012
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