Physics
what is electromagnetic radiation?
what is the pH scale?
the pH scale determines the acidity or basicity of a solution. solutions under the pH of 7 are acidic, and those above 7 are basic.
are viruses living, or non-living?
they are non-living
what is one type of application involving infrared light?
Infrared light is used by:
electrical heaters, cookers, short-range communications like remote controls, and thermal imaging cameras which detect people in the dark.
what kind of reaction combines two compounds to form one?
synthesis reaction
what can stem cells be used for?
stem cells can be turned to any specialzied cell in the body to make up tissue.
what is the formula used to find the critical angle of refraction?
ni sin c = nr sin(90)
balance and name this chemical equation:
C3H8 + O2 → CO2 + H2O
this is a combustion reaction
balanced:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
where on the body is the greatest number of microorganisms found?
they are found most commonly on the face, neck, and genatil area/ where the greatest concentration of apocrine and sebaceous glands are found; they are found in these areas to be supplied with nutrients
what type of lens corrects hyperopia?
convex lenses are used to correct hyperopia
which compound is this:
SeF6
Selenium Hexaflouride
what classifies something to be a fruit?
any plant organ that contains a seed is classified as a fruit
the speed of light through a material is
1.24 x 10^8 m/s
what material is it?
the material is a diamond
how many valence electrons does bromine have?
*dont cheat
bromine has seven valencer electrons
Are there any parts of the human body that get oxygen directly from the air and not from the blood?
yes, there is one. it is the cornea and it directly receives oxygen from the air since it has no blood supply