- An object's kinetic energy depends on its mass and its speed.
- The faster something is moving and the heavier it is, the more work it can do.
- Kinetic energy increases as an object moves faster.
- If an objects speed is doubled > kinetic energy is quadrupled.
<em>If an object is not moving, it does not have kinetic energy. </em>
Chromosomes from different parents determines the genetic structure of the child (from both parents) only with recessive genes ONLY becoming apparent if they are present in BOTH parents<span />
In a nutshell:
- Chemical reactions love stability.
- Usually if heat is given off, the chemicals are happier as they are more stable.
- This should happen naturally, like a ball rolling down a hill.
- But if you <em>force </em>chemicals to do things that make them more <em>unstable, </em>you're going to have to put energy in.
- Like forcing a ball up a hill, it isn't naturally going to roll up without you putting in energy.
- "exo-" means "away from" and "endo-" means "within". Think about this in terms of heat, or energy.
- heat released -> exothermic reaction (energy escapes)
- heat put in -> endothermic reaction (energy is put within)
Also the word "enthalpy" and ΔH is used a lot to relate to energy.
A negative ΔH means heat loss and a positive ΔH means heat put in as well.
Hope this helps ;)
Answer:
D. marks transformation of nitrogen (N₂) from the atmosphere to ammonium (NH₄ plus) by bacteria.
Explanation:
The nitrogen cycle is a biogeochemical cycle which involves transformation of atmoshperic nitrogen into many chemical forms including nitrite (NO2), nitrates (NO3) and ammonium (NH4).
The process of nitrogen cycle starts with the process of nitrogen fixation. In this process several nitrogen fixation bacteria such as cyno bacteria converts the atmospheric nitrogen into ammonium (NH4) in the soil. The resultant ammonium (NH4) can be directly used by plants or transform into nitrites or nitrates through nitrification process.
Hence, the correct option is D.
