I am speed
Do the wave
Sounds like fun
I am the speediest
Pink Floyd
Zap!
Circuit training
100
What is the speed of a cheetah that can run 30 meters in 1 second?
v = d/t
= 30 meters / 1 second
= 30 meters / second
100
What is another name for a compression wave?
A longitudinal wave.
100
What property of sound waves directly determines the pitch of the sound?
Frequency
100
How many kinds of cones do humans have in their eyes to see color?
Three: red, green, blue
100
Light travels slowest in media that are...
(A) less optically dense
(B) more optically dense
(B) more optically dense
100
Most things in the universe are...
(A) overall positive
(B) overall negative
(C) overall neutral
(C) Most things in the universe are neutral.
100
A 3-ohms resistor has 2 Amps of current running through it while connected in series with a battery. What is the voltage of the battery?
V = IR
= (2 Amps)(3 ohms)
= 6 Volts
200
How far did a car travel when it traveled at 30 mi/h for 2 hours?
d = vt
= (30 mi/h) (2 h)
= 60 miles
200
Which line correctly shoes one wavelength in this wave?
Line C, because wavelength is measured between identical parts of a wave.
200
How is the intensity of sound measured?
Decibels
200
Red and green primary colors of light shine on a red filter. Which color(s) are transmitted by the filter?
Red
200
How tall of a mirror is needed for a 4-foot great dane to see its entire reflection?
The mirror needs to be 2 feet tall.
200
Two negative charges are placed right next to each other, and then released. Do they...
(A) move towards each other
(B) move away from each other
(C) stay put
(B) They would accelerate away from each other.
200
If you double the voltage in a simple circuit, while the resistance stays the same, how does the current change? Or does it not change at all?
The current would also double, because current is proportional to voltage.
300
What is the speed of a wave on a string with a wavelength of 3 meters and a frequency of 8 Hertz?
wave speed = (wavelength) (frequency)
= (3 meters) (8 Hertz)
= (3 meters) (8 (1/sec))
= 24 meters / second
300
Which line best represents the amplitude of this wave?
Line A, because amplitude is measured from the equilibrium position to a crest or trough.
300
What phenomenon occurs when two unmatched frequencies interfere with each other?
Beats
300
Which two colors of light will produce yellow light when mixed with equal intensity?
Green and blue.
300
Light that travels from a dense medium to one that is less dense will bend ___ the normal line.
(A) towards
(B) away from
(B) away from
300
What method of charging causes clothes to stick together after tumbling in a dryer?
Charging by friction.
300
A 60-Watt lightbulb has 0.5 Amps of current running through it. What is the voltage across this lightbulb?
V = P/I
= (60 Watts) / (0.5 Amps)
= 120 Volts
(this is the standard voltage for wall outlets in the U.S.)
400
What is the frequency of a wave with a wavelength of 3 meters that travels at 3,000 meters per second?
frequency = wave speed / wavelength
= (3,000 m/s) / (3 meters)
= 1,000 Hertz
400
A wave makes 10 vibrations every 2 seconds. What is...
(a) the frequency of the wave?
(b) the period of the wave?
(a) The frequency is 5 Hertz (vibrations per second).
(b) The period is 1/5 seconds.
400
Does sound travel fastest through cold air or hot rocks?
Hot rocks!
400
How should you orient the polarizing filter in sunglasses to block out the glare from the road on a rainy night?
The filters should be oriented like vertical picket fences, because light that reflects off a smooth surface is polarized parallel to that surface.
400
What is the name for the phenomenon where blue light bends more dramatically than red light when passed through a prism?
Diffraction
400
An aluminum can with -6 units of net charge on it is touched with a grounding rod. What is the net charge on it now?
Zero, or neutral.
400
If you halve the resistance in a simple circuit, while the voltage remains the same, how does the current change? Or does it not change at all?
The current would double, since current and resistance are inversely proportional to each other.
500
You yell across a canyon and the echo takes 1 seconds to get back to you. If sound travels at about 344 m/s, how far away is the canyon wall?
d = vt
= (344 m/s) (0.5 seconds)
= 172 meters away
500
The points on a standing wave where maximum displacement occurs are called...
(A) nodes
(B) antinodes
(B) antinodes
500
What phenomenon makes noise-cancelling technology possible?
Destructive interference.
500
Order the whole EM spectrum in order of highest frequency to lowest frequency.
Gamma ray, X ray, UV, visible light, IR, microwave, radio wave
500
What kind of mirror is on the passenger side of your car, which reads, "Objects in mirror are closer than they appear?"
Convex mirror
500
What method of charging is shown? What will be the net charge on Can Y?
Charging (permanently) by induction.
Can Y will be negatively charged.
500
Two 5-ohm resistors are connected in series across a 20-Volt battery. What is...
(a) the total resistance?
(b) the total current?
(c) the voltage drop across each lightbulb?
(a) Total R = 5 ohms + 5 ohms = 10 ohms
(b) Total I = V / R = 20 Volts / 10 ohms = 2 Amps
(c) The voltage drop across each lightbulb would be 10 Volts.