physics sem 2 1st six weeks

What term below describes the average kinetic energy of a substance? 

temp

Water is ultimately one of the substances that is essential for life on Earth. One of the main reasons that this is true is because water can absorb a large amount of thermal energy without having a large change in temperature. That ability to moderate its temperature helps it moderate the temperature of the climate itself.  The degree to which water's temperature is effected by thermal energy is because of which of its properties? 

specific heat

Which object below could have a low kinetic energy while its particles also have a low average kinetic energy?

 

An ice cube in a drinking glass

The total kinetic and potential energy of the particles that make up a substance is the _____ of that substance. 

internal energy

What best describes a burning piece of lava that is shot out of a volcano?

High average kinetic energy of its particles, high kinetic energy for the object.

Which example below is a situation in which a person has been burned by EMR?

Getting a suntan at the beach.

What property must a substance have in order for it to undergo convection?

It has to be able to circulate

Which situation below is an example of conduction? 

Burning your hand after touching a hot stove.

Which situation below is an example of radiation? 

sun warming earth

Which situation below is an example of convection? 

Hot air rising off the beach.

Three waves pass by your boat in the lake in one second. What is the frequency of the waves?

3 Hz

A guitar string vibrates 880 times in 2 seconds. What is the frequency of the guitar string?

440 Hz

A child on a playground adds energy to a rope to make it go higher and lower that it previously did. The child is increasing the ___ of the wave.

Amplitude

A bobber on the end of a fishing line moves up and down 4 times in one second because of waves in the lake. Later in the day, it bobs up and down 6 times a second. What about the waves is changing in order to make the bobber move up and down at a faster rate?

frequency

When using the word “propagate,” physicists are talking about the ––

transmission of a wave through a region

The distance between two crests on a wave can be used to measure a wave’s ––

wavelength

A wave in which the particles oscillate perpendicularly relative to the direct in which the wave is traveling is a ––

transverse wave

In a transverse wave, particles in the medium will move ___ to the propagation of the wave

perpendicular

In a longitudinal wave, regions where particles are spread farthest apart are referred to as

rarefactions

A wave with a velocity of 12m/s has a frequency of 40 Hz. What is the wavelength of the wave?

.3m

A leaf on the surface of a pond bobs up and down 12 times in 30 seconds. The wavelength of the waves on the pond is 3 m. What is the velocity of the waves?

1.2m/s

Which of the following are characteristics of a longitudinal wave?

     I- Has an amplitude
     II- Particles move perpendicular to the wave propagation
     III- Particles more parallel to the wave propagation
     IV- Has a frequency

I, III, IV

The main difference between a transverse and a longitudinal wave is the ––

motion of particles relative to wave propagation.

What type of waves are sound waves classified as?

Longitudinal

Air molecules will move ___ to the propagation of a sound wave.

parallel

If the frequency of a sound wave increases, what happens to the wavelength of the sound

it decreases

Regions in a sound wave where the density of particles is the least are referred to as ––

rarefractionss

If two waves are in phase, this means that­­ ––

their crests are aligned

If two waves are in phase, this means that­­ ––

has no amplitude

In a longitudinal wave, compressions are similar to ___ in transverse waves.

crests

When the reflected waves interact with incoming waves to produce locations where destructive interference cancels out motion, a ___ is produced

standing wave

Sounds that have a higher pitch also have a higher–

frequency

If a car is moving toward you and blows its horn, compared to the driver, you will hear–

the horn at a higher pitch

The amplitude of a wave can be measured from –

equilibrium position to crest

A wave's frequency can be described as–

the number of wave cycles that pass by per second

A wave has a frequency of 40 Hz and a wavelength of 12 m. What is the velocity of the wave?

480m/s

A duck on a pond bobs up and down 45 times in 60 seconds. The velocity of the waves in the pond is 4 m/s. What is the wavelength of the pond waves?

5.3m

If the frequency of a sound wave decreases and its velocity remains constant, what will happen to its wavelength?

its wavelength will increase

Which of the following wavelengths will produce resonance in a 12 m long tube that is closed at one end?

48m

A friend sees you walking down the street and blows their horn to get your attention. What happens to the pitch that you hear as the car goes past?

It will increase in pitch as the car approaches and decrease after the car has passed

What is the wavelength of a light wave with a frequency of 3.2x10¹³ Hz?

 

9.38x10^–6 m

Electromagnetic radiation is ––

light

Which of the following are types of electromagnetic radiation?

  I- Radio

  II- Microwave

  III- X-Ray

An electromagnetic wave with a high frequency has ___ than one with a lesser frequency.

more energy

Atom A emits and absorbs photons that have a wavelength of 656 nm. Atom B absorbs and emits photons with a wavelength of 700 nm. Which atom is absorbing and emitting photons of the highest energy?

Atom A emits a photon with a wavelength of 445 nm. Atom B emits a photon with a wavelength of 670 nm. Which atom produces the photon with the highest frequency? 

atom a

Which subatomic particle plays the biggest role in producing an atoms spectra?

an electron

All wavelengths of light have the same ––

speed

If an electron absorbs a photon, it will emit a photon with­­ ––

 

the same wavelength and the same frequency.

Diffraction occurs when­­–

Waves pass through a narrow opening or around a thin object.

The beam of light from a source that strikes a surface is the

incident ray

The angle of reflection is always the same as–

The angle of incidence

An object is placed 15 cm in front of a thin convex lens with a focal length of 10 cm. What type of image is formed?

The image is real, inverted, and reduced in size, located approximately 15 cm from the lens on the opposite side.

According to the graph of above, for which of these angles would the intensity be 0 units?

90 degrees

As a light beam enters a more optically dense material, it will–

Slow down and bend toward the normal

An interference pattern is produced by–

Constructive and destructive interference

Suppose a person stands 2 meters in front of a plane mirror. Predict the characteristics of the image formed in the mirror.

The image is the same size as the person but the left and right sides of the person are reversed on the image.

According to the graph of above, what would be the approximate intensity at an angle of 45 degrees?

1 unit

How do 3D movie glasses create a 3D effect?

By using polarized lenses to send different images to each eye