Fundamental Concepts of waves
Which statement best describes what determines the speed of a mechanical wave?
A. The amplitude of the wave
B. The way the wave is generated
C. The physical properties of the medium
D. The frequency chosen by the source
C. The physical properties of the medium
1. Which formula gives the speed of a transverse wave on a stretched string?
A. v=sqrt(μ/T)
B. v=sqrt(T/μ)
C. v=Tμ
D. v=T/μ
B. v=sqrt(T/μ)
Which quantity represents the spatial period of a wave?
A. Frequency
B. Period
C. Wavelength
D. Angular frequency
C. Wavelength
16. Which expression has the correct physical units for wave speed?
A. sqrt(N/(kg/m))
B. kg·m/s
C. N/m
D. sqrt(Pa·kg/m^3)
A. sqrt(N/(kg/m))
Which television series is widely credited with accelerating the global popularity of Korean pop culture in Western mainstream media during the late 2010s?
A) Parasite
B) Squid Game
C) Crash Landing on You
D) Train to Busan
B) Squid Game
2. Why is particle speed not equal to wave speed?
A. Particles remain fixed in place
B. Energy propagates through the medium, not matter
C. Particle motion is always perpendicular
D. Wave speed is always constant
B. Energy propagates through the medium, not matter
2. The linear mass density μ\muμ of a string is defined as:
A. μ=L/m
B. μ=ρA
C. μ=m/L
D. μ=mL
C. μ=m/L
The frequency of a wave is best described as:
A. The time for one oscillation
B. The number of oscillations per unit time
C. The distance between consecutive crests
D. The maximum displacement from equilibrium
B. The number of oscillations per unit time
Good Luck
+200
In the Marvel Cinematic Universe, the Infinity Stones are remnants of what cosmic event, according to the films?
A) The creation of the multiverse
B) A failed experiment by the Celestials
C) The Big Bang
D) The destruction of a previous universe
C) The Big Bang
3. Which quantity does NOT affect the speed of a wave on a stretched string?
A. Tension
B. Linear mass density
C. Frequency
D. Material of the string
C. Frequency
3. If the tension in a string increases by a factor of 4, the wave speed will:
A. Double
B. Quadruple
C. Increase by a factor of 4
D. Remain unchanged
A. Double
Which relationship correctly connects wave speed, wavelength, and frequency?
A. v=λ/f
B. v=f/λ
C. v=λf
D. v=λ+f
C. v=λf
If the density of a medium hypothetically approached zero, the wave speed would:
A. Approach zero
B. Remain constant
C. Increase without bound
D. Become undefined immediately
C. Increase without bound
Which historical event is commonly cited as the beginning of the modern Olympic Games?
A) The first Olympic Games in Ancient Greece
B) The founding of the International Olympic Committee
C) The 1896 Athens Olympics
D) The 1900 Paris World’s Fair
C) The 1896 Athens Olympics
4. Wave speed is determined by the balance between:
A. Frequency and wavelength
B. Amplitude and energy
C. Restoring forces and inertia
D. Pressure and volume
C. Restoring forces and inertia
4. Two strings have the same tension. String A has twice the linear mass density of string B. How do their wave speeds compare?
A. vA=2vB
B. vA=sqrt(2vB)
C. vA=vB
D. vA=(1/sqrt(2))vB
D. vA=(1/sqrt(2))vB
Two points on a wave are said to be in phase if they have:
A. The same velocity at all times
B. The same displacement and motion direction
C. The same amplitude only
D. The same frequency
B. The same displacement and motion direction
Increasing the density of a medium generally decreases wave speed because it:
A. Reduces the restoring force
B. Increases the medium’s inertia
C. Shortens the wavelength
D. Lowers the frequency
B. Increases the medium’s inertia
Which biological molecule is primarily responsible for carrying genetic information in living organisms?
A) RNA
B) Proteins
C) DNA
D) Lipids
C) DNA
5. Why does density explicitly appear in wave speed formulas?
A. It controls wave amplitude
B. It determines the wavelength
C. It accounts for energy dissipation
D. It measures inertia per unit length or volume
D. It measures inertia per unit length or volume
5. If both the tension and linear mass density of a string are doubled, the wave speed will:
A. Double
B. Increase by sqrt(2)
C. Remain unchanged
D. Decrease by half
C. Remain unchanged
If a wave is described by y(x,t)=Asin(kx−ωt), what does the wave number k represent?
A. Temporal frequency
B. Angular frequency
C.Wave number
D. Phase velocity
C. Wave number
Which modification would be most effective for increasing wave speed in a transmission cable?
A. Increasing amplitude
B. Increasing frequency
C. Reducing linear mass density
D. Increasing wavelength
C. Reducing linear mass density
In popular science communication, what is the primary function of mitochondria in eukaryotic cells?
A) Protein synthesis
B) Energy production
C) Storage of genetic material
D) Waste elimination
B) Energy production