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What is the equation for momentum?
p=m(v) kg m/s
What is the equation for change in momentum?
ΔP=mΔv
how to calculate change in?
Δ=Final - initial
How do you calculate impulse?
I=Ft
What unit is mass measured in?
kilograms (kg)
What unit is velocity measured in?
m/s
how to calculate change in velocity?
final velocity - initial velocity
What is conservation of momentum?
momentum before collision is equal to the momentum after the collision
initial = final of system
What unit is force measured in?
newtons (N)
What unit is time measured in?
seconds
How does changing the time of a collision affect the force in the collision?
if time gets larger force decreases, if time decreases force increase
What is the equation for kinetic energy?
½ mv²
What is the equation for potential energy?
(m)(g)(h)
What is g?
Gravity, and it equals 9.8 m/s²
when is the gravitational potential energy the highest in a system?
When the object is the highest above a surface (m and g stay constant but the height can change)
when is the kinetic energy highest in a system?
At the lowest point, the speed is maximum and so the kinetic energy is maximum while the potential energy is minimum.
Is the total kinetic energy in a system equal to the total potential energy in a system?
yes - conversion of energy
What are the units for impulse?
Nsec
What is the conversion of energy?
potential + kinetic = total at all times (potential = kinetic)
What is 5,182,000 in scientific notation
5.182 × 106
What is 0.0004123 in scientific notation
4.123 × 10-4
What is 8.1245 × 107
81,245,000
what is 1.563×10-4
0.0001563
What does E mean
x10(to whatever exponent)
When do you round down
x<5
When do you round up
x>5
Round 524 to the tens place
520
round 7293 to the hundreds place
7300
round 12390 to the thousands place
12000
round 0.5367 to the hundredths place
0.54
What is a certain value
the item passes that number on the measuring device
What is an uncertain value
It isn’t exactly marked on the measuring device. You are guessing a number that is in between two marked measurements
How many significant figures does 6830 have
3
how many significant figures does 1683.0 have
5
how many sig figs does 146 have
3
how many sig figs in 0.01647
4
how many sig figs in 7.00245
6
Whats Accuracy?
how close the measurement is to the “true” or “accepted” value
Whats precision?
How close a group of measurements are to each other
How many sig figs does an exact number have
infinite
SI Prefix - deca (da)
101
SI Prefix - deci (d)
10-1
SI Prefix - centi (C)
10-2
SI Prefix - Milli (m)
10-3
SI Prefix - Micro (greek m)
10-6
SI Prefix - Nano (n)
10-9
SI Prefix - pico (p)
10-12
SI Prefix - Hecta (h)
102
SI Prefix - Kilo (k)
103
SI Prefix - Mega (M)
106
SI Prefix - giga (G)
109
SI Prefix - Tera (T)
1012
What quantity is meters
Length
What quantity is seconds
time
What quantity is liters
volume
What quantity is grams
mass
When using the fraction method for conversions which unit goes in the numerator?
The number you are converting into
What is the formula for finding velocity?
v= 4.45 times the square root of the height in meters
What is an elastic collision?
Bouncy collision
What is an inelastic collision?
sticky collision
When the movement is upwards is the velocity + or -?
positive
When the movement is downwards is the velocity + or -?
-
What is the relationship between change in momentum and impulse?
They are equal
What is the equation for force?
f=m x a
What is potential energy
Energy due to position
What is kinetic energy?
Energy due to motion
In a pendulum when does the ball have the most kinetic energy?
At the bottom of the swing
In a pendulum when does the ball have the most potential energy?
at the top of the swing
In a pendulum when does the ball have mixed energy?
between the top and bottom of the swing
What is the elastic collision =?
(m1v1i)+(m2v2i)=(m1v1f)+(m2v2f)
What is the inelastic collision =?
(m1v1i)+(m2v2i)=(m1+m2)vf
How do you balance chemical equations?
place coefficients in front of the products and reactants until both sides have an equal number of each molecule
How do you calculate molar mass?
Multiply the atomic mass by the number of that atom - if one substance is made up of multiple elements, add them up at the end.
How do you complete 3 step problems?
Complete all the steps through multiplication and division
How do you convert between moles, mass, volume of a gas, and particle?
Through various multiplication and division - canceling out certain units in order to get the desired result
What is cellular respiration?
the process by which cells derive energy from glucose.
What is photosynthesis
the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar
What is the equation for photosynthesis?
6CO2 + 6H2O → C6H12O6 + 6O2
What is the equation for cellular respiration?
C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP
What is glucose?
the main type of sugar in the blood and is the major source of energy for the body's cells.
Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose
What is Glucose’s chemical formula?
C₆H₁₂O₆
Where does cellular respiration occur?
mitochondria
What organisms go through photosynthesis?
Plants
What organisms go through cellular respiration?
Every living thing
What is Avogadro’s number equivalent to?
1 Mole of that element, the mass number of the element in grams, 6.02 × 10²3
What is similar about 1 mol of Ag and 1 mol og Au?
The contain the same number of atoms - avogadro’s number
Where does photosynthesis occur?
Chloroplast
What is 22.4L equal to?
1 mol
