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| What factors determine the resistance of a resistor? |
type of materical, length, width, and temperature |
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noblejas Tue, 20 May 2008 22:20:07 GMT |
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| What are the different ways an object can be charged? |
friction, contact, induction |
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noblejas Tue, 20 May 2008 22:17:30 GMT |
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| Which colored lights make up white? |
red, blue, and green |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| Which colored lights make up yellow? |
red and green |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| Which colored lights make up magenta? |
red and blue |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| Which colored lights make up cyan? |
blue and green |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| What is the equation to find the equivalent resistance in a parallel circuit? |
R(eq)= (1/R₁+1/R₂+...)^-1 |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| What is the equation to find the equivalent resistance in a series circuit? |
R(eq)= R₁+R₂+... |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| What type of circuit doesn't decrease the power to the loads as more are added? |
parallel |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| What type of circuit has junctions? |
parallel |
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noblejas Thu, 15 May 2008 18:30:58 GMT |
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| What type of circuit uses the least total power? |
series |
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noblejas Thu, 15 May 2008 18:26:39 GMT |
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| What type of circuits requires all elements to work? |
series |
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noblejas Thu, 15 May 2008 18:26:39 GMT |
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| What is the difference between series and parallel circuits? |
series: elements are only in 1 path
parallel: elements are in multiple paths |
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noblejas Thu, 15 May 2008 18:26:39 GMT |
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| What type of devices use dc? |
ones that use batteries |
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noblejas Thu, 15 May 2008 18:26:38 GMT |
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| What type of devices use ac? |
ones that you plug in |
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noblejas Thu, 15 May 2008 18:24:37 GMT |
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| What does ac and dc stand for? |
ac: alternating current
dc: direct current |
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noblejas Thu, 15 May 2008 18:24:37 GMT |
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| What's the difference between ac and dc? |
ac: current goes back and forth
dc: current goes only in 1 direction |
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noblejas Thu, 15 May 2008 18:24:37 GMT |
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| What is the equation that relates the current, voltage, and resistance in a circuit? (Ohm's Law) |
I = V/R |
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noblejas Thu, 15 May 2008 18:24:37 GMT |
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| What is the equation for power? |
P = IV
P = V²/R |
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noblejas Thu, 15 May 2008 18:22:15 GMT |
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| What is power in the traffic analogy? |
packages per sec (per unit time) |
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noblejas Thu, 15 May 2008 18:22:15 GMT |
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| What is the unit for power? |
watts (WO) |
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noblejas Thu, 15 May 2008 18:22:15 GMT |
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| What is power? |
energy per unit time |
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noblejas Thu, 15 May 2008 18:22:15 GMT |
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| What is charge in the traffic analogy? |
trucks |
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noblejas Thu, 15 May 2008 18:04:30 GMT |
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| What is resistance in the traffic analogy? |
speed bumps |
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noblejas Thu, 15 May 2008 18:04:30 GMT |
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| What are the units for resistance? |
ohms (Ω) |
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noblejas Thu, 15 May 2008 18:04:30 GMT |
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| What is resistance? |
anything that slows down the flow of charge |
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noblejas Thu, 15 May 2008 18:04:30 GMT |
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| What is potential difference in the traffic analogy? |
the steepness of the hill |
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noblejas Thu, 15 May 2008 18:04:30 GMT |
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| What are the units for potential difference? |
volts (V) |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What is potential difference/voltage? |
electric pressure that causes charge to move |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What is current in the traffic analogy? |
the flow of cars |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What is the unit for current |
amperes (A) |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What is current? |
the movement of charge |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What is charge polarization? |
when a charged object is brought next to a neutral insulator and one side of the insulator becomes slightly positive while other become slightly positive |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What atomic property determines whether a given material is a conductor or insulator? |
whether the electrons are tightly bound to the atom (insulators) or free (conductors) |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| How do like charges interact? Unlike? |
likes repel
unlikes attract |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What's the difference between polarized and unpolarized light |
polarized light oscillates only in one plane |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What are the primary colors for pigments? |
cyan, magenta, yellow |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What are the primary colors of light? |
red, blue, green |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What type of surfaces produce specular reflection? Diffuse reflection? |
specular: smooth surfaces
diffuse: rough surfaces |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What is the difference between specular and diffuse reflection? |
specular is when light reflects in one direction, diffuse is when is reflects in multiple direcitons |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What is the relationship between decibel levels, intensity, and loudness |
for every 10 dB increase, the intensity is multiplied by 10, and the loudness is multiplied by 2 |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What happens when sound interferes constructively? |
louder sound |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What happens when sound interferes destructively? |
lower or no sound |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What are the units for loudness? |
decibels |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| In which of the 3 media (solid, liquid, gas) is sound fastest? slowest? |
fastest in solid
slowest in gas |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| what are ultrasonic sounds? |
sounds above the range for human hearing |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What are infrasonic sounds? |
sounds below the range for human hearing |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What the range for human hearing? |
20-20,000 hz |
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noblejas Thu, 15 May 2008 18:04:29 GMT |
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| What determine the speed of a wave? |
the medium it is traveling through |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| In the Doppler Effect when does the pitch seem higher than it really is? |
when the source and listener are moving closer together |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| In the Doppler Effect when does the pitch seem lower than it really is? |
when the source and listener are moving farther apart |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What is the Doppler Effect? |
When the frequency appears to change when the source or listener are moving with respect to one another |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What is the difference between nodes and antinodes? |
nodes are point that don't appear to move, antinodes oscillate back and forth in place |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What is a standing wave? |
when incoming waves interfere with reflected waves to form waves that don't appear to travel from one point to the other. |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| When does destructive interference occur? |
when the crest of one wave overlaps with the trough of another |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What is destructive interference? |
when two waves interfere to form a smaller/no wave |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| When does constructive interference occur? |
when the crest of one wave overlaps with the crest of another |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What is constructive interference? |
when two waves interfere to form a larger wave |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What is interference? |
when two waves overlap and form a new wave |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What type of wave is sound? |
longitudinal |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What type of wave is light? |
transverse |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What's the difference between transverse and longitudinal waves? |
longitudinal waves oscillates goes side to side
transverse oscillates up and down |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What equation relates wave speed, frequency, and wavelength? |
v= λf |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What equation relates period and frequency? |
T= 1/f |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What's the difference between period and frequency? |
frequency is waves/time (# of waves per unit time)
period is time/wave (time for one wave) |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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| What are the parts of a wave and their units? |
amplitude (m)
fequency (hz)
wavelength (m)
wave speed (m/s)
period (s) |
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noblejas Thu, 15 May 2008 18:04:28 GMT |
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