<span>1. Use these definitions:
</span>
<span /><span /><span>
i) Kinetic energy (KE) is energy in action in virtue of the motion. KE = (1/2)mv². You can tell there is KE wthen the object is moving.
</span><span />
<span>ii) Potential energy (PE) is a stored energy. You notice the PE once it is transformed into another form of energy, for example into kinetic energy or heat, or light. The maing forms of potential energy are gravitational potential energy (mgh), elastic potential energy (1/2)kx², and chemical potential energy.
</span>
<span /><span /><span>
</span><span>2) Answers
</span>
<span /><span /><span>
1. A bicyclist pedaling up a hill: K
In virtue of the motion (speed) the byciclist has kinetic energy. Neverthelles, the pedalyst also has potential energy, which you could notice if she stops pedaling, because then she would start to go down the hill without pedaling.
</span><span>2. An archer with his bow drawn : P
</span>
<span></span><span /><span>
The bow will have elastic potential energy in virtue of which the arrow will be throwm as soon as the archer release it.
3. A volleyball player spiking a ball K
</span><span>The ball will have kinetic energy in virtue of its speed </span>
<span /><span>
4. A baseball thrown to second base: K
</span><span />
<span>The baseball will have kinetic energy in virtue of its speed.
</span><span />
<span>5. The chemical bonds in sugar: P
</span><span />
<span>The bonds have stored potential energy. This energy is named chemical energy. When the bonds break they release energy in the form of heat, light or sound.
6. The wind blowing over a tree: K
</span><span />
<span>The wind is moving, so it has kinetic energy. You notice the energy of the wind because it is capable to move the leaves or even the same tree, The same happens when the wind moves the blades of a windmill.
7. Walking down the street: K
</span><span />
<span>When you walk you are moving, so you have speed and that is kinetic energy.
8. Sitting at the top of a tree: P
</span><span />
<span>Sitting on a high place gives you potential energy (mgh). You potentially can suffer an injure if you fall down. The potencial energy transforms into kinetic energy when you fall down.
</span><span />
<span>9. A bowling ball rolling down the alley: K
</span><span />
<span>The ball is rotating and translating. It has angular speed and traslational speed.Both are kinetic energies.
10. A bowling ball sitting on the rack: P
</span><span />
<span>While the ball is on the rack, it has the possibility to fall down. The ball can fall off the rack and hit the floor or your foot. The stored (potential) energy can be transformed into kinetic energy.
</span>
Complete Question
The complete question is shown on the first uploaded image
Answer:
The value is 
Explanation:
From the question we are told that
The voltage of the cell is 
Generally 
is mathematically represented as
Where 
is the equilibrium constant for this auto-ionization of water with a value 
Generally the 
is mathematically represented as
=> 
=> 
This is mathematically represented as
Where n is the number of moles which in this question is n = 1
So
=> 
So
=> 
=>
Oxygen
Explanation:
Joseph Priestly's contribution to chemistry was the discovery of oxygen gas.
He was one of the notable chemist of his day. He lived from 1733 - 1804 and in 1774, discovered oxygen.
- He was one of the foremost scientist to discover the gaseous exchange process that occurs during photosynthesis.
- His works showed that plants absorbs carbon dioxide and releases oxygen gas into the atmosphere.
Learn more:
Photosynthesis brainly.com/question/2761166
#learnwithBrainly
Answer:
1. 
2. 
Explanation:
An ion is formed when an atom that is said to be neutral gains or losses electrons.
It is thought that a negative ion (anion) is produced as it gains electrons and a positive ion (cation) is formed when it loses an electron.
Atomic number is the total number of protons and electrons in a neutral atom.
From the information
Protons = 14
electron = 18
Net Charge = no of proton - no of electron
= 14 - 18 = -4
Mass number = 14 + 15 = 29
Thus, the chemical symbol =
For ion with 27 proton, 32 neutrons and 25 electrons
Net charge = 27 - 25 = +2
Mass number = 27 + 32 = 59
Thus, the chemical symbol =
