Exam review (Physics)
4 amps
A 10-ohm resistor and a 20-ohm resistor are connected in series to a battery. When the current through the 10-ohm resistor is 4 amps, what is the current through the 20-ohm resistor?
halved
A 100-ohm resistor is connected to a battery. If instead a 200-ohm resistor is connected to the same battery, the current in the circuit is?
doubled
A 12-ohm resistor is connected to a variable-voltage battery. If the voltage provided by the battery is doubled, the current through the resistor is?
Toward the normal
A beam of light passes at an angle from air to water. Which way, if at all, does this light bend?
Slow down
A beam of yellow light crosses a boundary from air into Lucite at an angle of incidence of 45 degrees. Lucite has an index of refraction n= 1.5. Does the light speed up, slow down, or remain at the same speed when entering the Lucite?
it bends towards the normal
A beam of yellow light crosses a boundary from air into Lucite at an angle of incidence of 45 degrees. Lucite has an index of refraction n= 1.5. How does the light bend when it enters the Lucite?
28 degrees
A beam of yellow light crosses a boundary from air into Lucite at an angle of incidence of 45 degrees. Lucite has an index of refraction n= 1.5. Which might be the angle of refraction in Lucite?
Virtual only
A diverging lens can form images that are?
0.1 Hz
A duck floating on a lake oscillates up and down 5 times during a 10 second interval as waves pass by. What is the frequency of the water waves?
frequency (x)
A light wave travels from air into water. Which of the following properties of the wave must be the same in the water as in the air?
An amplitude of 10 m
A source creates 10 waves each second. These waves have?
a larger period
A trumpet produces a sound wave of frequency 440 Hz. A trombone produces a sound wave of frequency 220 Hz. Compared to the trumpet's sound wave, the sound wave produced by the trombone has?
It will still be green, ad will be less bright
A wave of green light is traveling through air. As it enters a new material, its frequency remains the same and its amplitude decreases. Which of the following describes the appearance of the light in the new material?
2 m
A wave with a frequency of 5 Hz and a speed of 10 m/s has a wavelength of?
amplitude
An electric guitar is playing a note. An increase in which sound wave characteristic would result in a louder note?
longitudinal
As a wave travels through a material, the particles of the material vibrate in the direction of the wave's travel. What type of wave is travelling through the material?
decreases
As yellow light travels from Zircon into diamond, the speed of the light wave what?
greater
Compared to the speed of a sound wave in air, the speed of an ultraviolet wave in air is?
less
Compared to the wavelength of red light, the wavelength of violet light is?
no image of the trees will be seen on the paper
Light from a distant tree hits a flat-shaped mirror, and is reflected onto a piece of paper. Which of the following is correct about what is seen on the paper?
2. Zircon
The index of refraction table is in your notes. Which of the following substances does light travel slowest? 1. Air 2. Zircon 3. water 4. corn oil
Material A
The speed of light in material A is 250 million m/s. The speed of light in material B is 280 million m/s. Which material has a greater index of refraction?
Frequency
Two waves have the same period. What other property of these two waves must also be the same for each?
Wave 2
Wave 1 ad wave 2 have the same wavelength. Wave 1 has a larger period than wave 2. Which wave, if either, has a larger speed?
Wave 2 (m)
Wave 1 has a frequency of 100 Hz. Wave 2 has a frequency of 50 Hz. Which wave, if either, has the larger period?
wave 1
Wave 1 has a frequency of 25 Hz. Wave 2 has a frequency of 250 Hz. Which wave, if either, has the larger period?
The angle of refraction
Which is larger, the angle of incidence, or the angle of refraction?
Light moves about a million times faster than sound
Which of the following is a correct statement about the speed of light and sound in air?
speed
Which of the following must be the same for both ultraviolet and infrared electromagnetic waves in a vacuum?
Refraction
Which phenomenon allows a lens to focus light?
Interference
the effect produced when two waves pass through the same position at the same time is called?
5 seconds
what is a period of a water wave if 2 complete waves pass a fixed point in 10 seconds?
4 seconds
what is the period of a wave if 20 crests pass an observer in 4 seconds?
3 meters
what is the wavelength of a 100 Hz sound wave in air?
The loudness of a sound wave is directly related to the wave's amplitude
which statement correctly describes one characteristic of a sound wave?