chapter 7
what is a theory
an explanation of how nature works
how many feet are in a mile
5280
list 3 physical properties
shape color density luster hardness brittleness malleability ductility tensile strength compressive strength elasticity shear strength electrical conductivity thermal conductivity melting point boiling point
what equation can time be expressed in
v= d/t
name 2 animals that use echolation
bats whales dolphins etc
define truth
the way things really are
what are the derived units
units based on the 7 base units
physical properties describe....?
Everything about a substance except its a chemical behavior
how many laws did newton make
3
what unit is used to measure frequency
hertz
where is the proton located in the atom
the nucleus
one mega watt is how many watts
1,000,000 watts
what are thermal properties
properties that describe the way substance behave when heated
what is the name of newtons first theory
the law of inertia
what is the difference between frequency and period
period is the time to complete one full cycle, while frequency is the number of cycles per unit time.
whats the difference between truth and fact
a fact can change but a truth cannot
convert 36 feet to inches
432 inches
what are the freezing point and boiling point of celcius
0.c and 100.c
what does newtons third law say
for every action there is an equal and opposite reaction
state the law of reflection
when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection
explain the choloric theory of heat
asseted that heat was an invisible and weightless fluid that flowed from hotter to cooler objects
convert 200 m/s to km/s
.2 kms
define absolute zero
the temperature at which all atomic motion would cease
what does newtons second law say
the acceleration of an object is proportional to the force acting on it
what is the date of the first Indian moon landing (allegedly)
India's chaandryan 3 mission August 23 2023 6:09 pm Indian standard time