foundational skills
what should chemistry and physics be measured in
physics metres/seconds/kilograms
chemistry m=grams n=moles M=molar mass
what is the phospholipid bilayer.
it is the cell membrane which has phospholipids that allow some materials through while blocking others. they have a hydrophilic head and a hydrophobic tail that face inward and hydrophilic heads face out words towards the extracellular environment or intracellular cytoplasm.
which are mellecular and ionic
a)FeO b)RbF c)ClC
a)iconic b) ionic c) molecular
how far the did the car go if it was going at a speed of 10m/s in 35 second
10m/s=d/35s 35x10=350
it went 350 metres in 35 seconds
a car accelerates from rest to 100km/h [n] in 15 seconds. what is the acceleration?
(100-0)/15s= 6.66666km/h[N]
7km/h[N]
isolate the change in time and rearrange
isolate change in time in a acceleration formula
time = finale velocity - initial velocity devided by acceleration
what are all the parts in a plant cell
cell wall, , a nucleus, smooth and rough endoplasmic reticulum, golgi apparatus, ribsones, mitochondria, chloroplast, vacuole.
what are double and single replacement, formation, decomposition and combustion.
double replacement is when two compounds that are the same type switch places. single replacement is when you switch two elements of the same type. formation is when there are two elements and they make a compound. decomposition is when you turn a compound into two elements. combustion is when you you turn compounds and elements into oxygen and carbon dioxide.
john drives 130km north and then goes 50km south and then her goes 34km north
what is the total distance and displacement
distance equals 214km
displacement= 114km/north
a person applies 30N of force to an object and moves it 5m what is the work being done
30X5=150J
convert 16kh/h X 2m/s to proper units and solve using proper units
6m/s
what is hypotonic, hypertonic and isotonic
hyper means there is more salt outside the cell so it takes the water from inside the object and shrinks it. hypotonic means there is less salt in the solution than the object making it absorb the solution making it larger in size. isotonic means there is an equal amount of salt in the solution and the object so the object does not take in any water or expell any water
finish the reaction and what type is it?
FeS+Ca
single replacement
CaS+Fe
a rock weighing 5kg rolls down a hill at a speed of 5m/s what is the kinetic energy
0.5x5x52=62.5 Joules
A car weighing 1500kg is about to go down a hill with a potential energy of 220,725 joules, travelling at a speed of 15m/s. What is the mechanical energy of the car?
Em = Ek + Ep
Ek = 1/2mv2
Ek = (0.5)(1500)(15)2=168,750 joules
Em= 168,750 joules + 220,725 joules = 389,475 joules of mechanical energy
sig figs= 390,000 joules
answer question using sig figs (1.75 X 5.oo / 6.00) squared
ansure 2.13
what is endocytosis and exocytosis ?
endocytosis is when the cell takes in substances from outside the cell by engulfing them in a vehicle derived from the cell membrane.
exocytosis is where cells shift materials, such as waste products, from inside the cell to the extracellular space.
solve the reaction and if it is AQ or S
FeP+CrN
CrP(s)+FeN(s)
a rock is about to roll down a hill with a mass of 20kg and a height of 100m. what is the potential energy?
20kgx9.81x100=19620J sig figs 20000J
500 joules of work is being done when I push a table, and I moved it 7 meters. What is the force being applied to the object?
W=fd
F=w/d
F=500/7=71.4Newtons
sig figs=70Newtons of force
ian drove to hay river at a speed of 62.137 miles/hour convert to km/per minute. how long did it take Ian to get to hay river which is 300km away.
1.609km for every mile
62.137miles/hour converted to kilometres per minute is 1.66630722km/minute X 180= 299.935299 using sig figs is equal to 300. it took ian 180 minutes to travel 300km.
what is diffusion osmosis and passive transport?
osmosis is the movement of water molecules from a area of high concentration to areas of low concentration. diffusion is the movement of solute particles from a high concentration to low concentration. passive transport the movement of molecules down the concentration gradient (this does not require energy to do)
what happens when you mix CH4+O2 and balance the reaction
Ch4+O --> h2+O
Ch4+2O2 --> 2H2O
a athlete with a mass of 150 pounds runs at a speed of 8m/s what is the students kinetic energy in proper units. there is 2.205 pounds in a kilogram
(150)/2.205=68.0272109kg
0.5x68.0272109x82=2176.87075j
A student that weighs 50kg runs a kilometre at the speed of 4m/s. What is the kinetic energy?
m:50kg
v:4m/s
Ek=(0.5)(50)(4)2= 400 joules