biology :D
Chemical formula for aerobic respiration
O2 + C6H12O6 -> H2O + CO2
Describe the densities and shapes of different physical states.
Solid: high density, definite shape
Liquid: moderate to high, no definite shape
Gas: low density, no definite shape
What is the formula for density
Density = mass/volume
Where is protease produce? What does it break down into?
Break down to amino acid
What are different types of bonding?
Metal + non-metal: ionic bonding
Non + non metal: covalent bonding
Metal + metal: metallic bonding
The student did 2240J of work going from the bottom of the stair to the top of the stair. The student took 2.8 seconds to run up the stair
Calculate the power the developed when running up the stair
Power = energy/time
2240/2.8=800 W
List 5 stages of digestion and list out the process of each stage.
1) Ingestion: taking food into the body
2) Digestion: breaking down food
3) Absorption: moving food into cell
4) Assimilation: making food part of cell
5) Elimination: removing unused food
What are the differences between physical and chemical changes?
Physical: State of substance change, no new substance is formed, can be reversed.
Chemical: new substances are formed, difficult to reverse, endo or exothermic.
1 MJ = ..... KJ
1 KJ = ..... J
1J = ..... mJ
1 MJ = 1000 KJ
1 KJ = 1000 J
1J = 1000 mJ
What does the root of the teeth contain?
Gum, pulp, cement, lateral canal, periodontal ligaments, blood vessels, nerves.
Acid + base --> ?
Acid + metal --> ?
Acid + metal carbonate --> ?
Base + ammonium salt --> ?
Acid + base --> salt + water
Acid + metal --> salt + hydrogen
Acid + metal carbonate --> salt + water + co2
Base + ammonium salt --> salt + water + ammonia
Formula of Hook's Law
What does each unit represent/mean
F = ke
Force = spring constant x extension
Deoxygenated blood --> vena cava --> down right atrium --> down right ventricle --> up pulmonary artery --> to lungs --> oxygenated blood from lungs to pulmonary vein --> down left atrium --> down left ventricle --> up aorta --> to body.
Balance equation:
C7H16 + O2 --> CO2 + H2O
C7H16 + 2O2 --> 7CO2 + 8H2O
State 4 contact force and 4 non-contact force
4 contact force: friction/ air resistance/ tension/ reaction forces
4 non contact force: gravitational/ electrostatic/ magnetic/ nuclear