Monday, September 28, 2015

making tea

I learned that the more energy that you give to a atom the more it spreads out  that example was when we gave heat energy to the particles and the tea spread really fast, particles are always vibrating and when you give them more energy they vibrate faster and harder to that result they spread faster.

 The less energy you give to a particle the less it vibrates end the more compact it stays, as seen in the example when we made tea with cold water the tea particles didnt have much energy so they didn't spread as fast.

Thursday, September 17, 2015

potential and kinetic enrgy

Where do objects get their energy from it depends a human from eating and having a chemical reaction, the bow and arrow by having elastic energy, and a radio from a electric source.

Energy cant be destroyed or crated but it can be converted like you can convert mechanical energy to sound and chemical to light like when you snap a glow in the dark stick.
Different forms of energy can be combined to make an object do something, like when you throw something to something you are using chemical energy of your food to mechanical and elastic of your muscles then gravitational when you throw it up and then when it falls friction is made and that friction makes heat.
Kinetic energy is energy that makes an object move like when you have a chemical reaction that makes a rocket move like bicarbonate-sodium and vinegar pushing a rocket up into the sky.
Potential energy is energy stored in a object like a battery the energy stored can be transformed into other energy.

Why is it important? humans fear the unknown when you know something well you don't fear it you feel confident and have less chance of injury.

Wednesday, September 16, 2015

Carts and ramps Kinetic energy and velocity

Kinetic energy means movement energy so if I have a lot of kinetic energy I have a lot of movement energy moving me, the more it is, the harder it moves the faster you go if you have a lot of kinetic energy your velocity is greater. I learned that I kinetic energy and speed work together in a way because without kinetic energy there can not be speed and that kinetic energy can come from gravitational mechanical chemical all sorts of energies. 

The velocity is increasing at a constant rate 
while the cart is going down the ramp
 but once it has reached the maximum
seed and it already has come
 down from the ramp the speed starts
 descending because of the friction
 and eventually coming to a complete stop


At the  start the kinetic energy 
does not have much this is because it is just
gaining the energy and it is barely moving
then it starts increasing because the inclination
of the ramp is making it have more
kinetic energy more force,
them it reaches the highest point of kinetic
energy and it starts decreasing because it
no longer has the ramp giving
it the kinetic energy it needs.
The kinetic energy gets transformed into sound
energy and heat energy of the tires.


Both graphs look like this because it start slow and starts increasing then when it reaches max speed and or max kinetic energy the ramp can give it starts descending because of the friction of the wheels.