IPC Fall semester exam review 200405

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IPC Fall semester exam review 2004-05
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• First aid is a procedure that is used to help fix
  a problem that has occurred to someone
• A safety procedure is what is used in the lab to
  prevent accidents
• Remember to read the lab directions and ask
  questions before you start the lab

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• Problem the question you are trying to solve
• Hypothesis an educated guess as to what the
  outcome will be
• Experiment the procedures you follow in the lab
• Data numbers and information you get from the
  experiment
• Conclusion answers the problem, based on the
  data from the lab, summaries the results

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How much is the mass on the balance?
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In the lab using the car and ramp, the following
data to the left was taken.
What is the relationship between distance and
time? How many seconds would have passed when the
car reached 50 cm?
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• A theory is a scientific explanation that is
  bases on many trials. (evidence)
• A hypothesis is an educated guess as to what the
  outcome will be.
• What is the difference between the two?

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• An observation is what you see, hear, taste,
  smell and feel
• An inference is a reason (explanation) that you
  come up with based on what you see.
• If you were selling a product, would you use
  someone popular or not known and why?

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• Work is measured in Joules (N/M)
• If you lift something work is done, however if
  you carry it no work is done.
• If the item doesnt move is any work done?
• Work Force x distance
• W FD
• Think !!! When you push an object which way does
  it move??? (Newton's 2nd law)
• Does it move parallel or perpendicular?

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• Newtons 1st law an object in motion stays in
  motion and an object at rest stays at rest until
  another force acts on it. (inertia)
• What happens when you speed up and stop when
  driving?

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• The six simple machines are the wheel and axle,
  lever, pulley, screw, inclined plane, wedge
• Simple machines multiply your _______?

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Mechanical Advantage

• Mechanical advantage is how much your effort is
  multiplied in a simple machine
• MA output force/input force
• In pulleys count the number of supporting
  strands
• Inclined plane length / height

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What is the mechanical advantage of the ramp?
2 feet
6 feet
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Speed

• Speed is distance / time
• What is the speed of a truck going 100 feet in 5
  seconds???
• How far can you go if you are running 10 feet /
  sec for 5 minutes?

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• Mass is how much of something there is and is
  measured on a balance in grams.
• When gravity (9.80 m/s2) pulls down on something
  you can use the formula
• Force (N) mass x acceleration
• If a truck weighs 500 newtons, what is its mass?

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Newtons 3rd law
For every action there is an equal and opposite
reaction?
If the water in the water gun quirts out to the
right, what is the opposite reaction?
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Mechanical advantage calculate and see which
one has more mechanical advantage
4 feet
2 feet
5 feet
1 foot
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• How much work did Sam do when he lifted a box 2
  meters that had a force of 700 N?

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time

• 60 seconds 1 minute
• 1 minutes 60 seconds
• 60 minutes 1 hour
• 12 hours 1 day
• How many seconds are in ½ day?

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graphing

• label
• X-axis
• Y-axis
• Dependant variable
• Independent variable

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• What does the law of conservation mean?
• What will happen if the ball on the left moved
  right and hit the stationary ball on the right?

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• Which statement is more valid and WHY??
• Bordens chocolate milk tastes the best.
• According to the FDA Bordens chocolate milk
  has 10 grams of calcium per serving?

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• Where is potential energy the highest?
• Where is Kinetic energy the highest?
• When rain falls down, potential energy is turned
  into kinetic energy and the speed _____________?

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Electricity vocab

• Current is the flow of electrons (charges)
  through a wire or any conductor
• Potential difference (voltage) a comparison of
  the energy carried by electrons at different
  points the difference between potential between
  two different places
• Conductivity the ability to carry current

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circuits

• Circuit a closed path in which electrons flow
• Open circuit means the switch or wire is open
  (or broken) not letting the electricity flow

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Closed circuit

• Closed circuit the switch is closed (connected)
  allowing the electricity to flow, path is
  continuous, not broken

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Series circuit

• There is only one pathway for the current to flow

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Parallel circuit

• There is more than one pathway for the current to
  flow

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• Recycling can help reduce pollution and save
  natural resources.
• According to the table which cannot be recycled.

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Calculating current

• To calculate current (I) use the formula
• I V/R
• Current is measure in amps (A)

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How much current is in the following series
circuit?
7 ohms
12 volts
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Which switches must be closed for the 1st light
bulb to work?
A
B
C
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When comparing a water system to electricity,
label the following parts.
Hose ??
Pump ??
Valve ??
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electromagnets

• An electromagnet is formed when an iron core is
  inserted into such a coil and a current is passed
  through the coil.
• What would happen if you put a smaller battery in
  the circuit?