• #### 1.  1 db is equal to

• Factor of 1000 in intensity
• Factor of 1.26 in intensity
• Factor of 102.610^{2.6}102.6 in intensity
• Factor of 10 in intensity
• #### 2.  A wave traveling at 340. m/s with a wavelength of 7.65 m will have a frequency of _____.

• 44.4 Hz
• 0.0225 Hz
• 2,601 Hz
• none of these

• 6.28 sec
• 3.14 sec
• 9.8 sec
• 1.57 sec
• #### 4.  In simple harmonic motion (SHM), the displacement x(t) of a particle from its equilibrium position is described by the equation of?

• x = xm cos(ωt - ϕ)
• x = xm cos(ωt - 2ϕ)
• x = xm cos(ωt + 2ϕ)
• x = xm cos(ωt + ϕ)
• x = xm cos(2ωt + ϕ)
• #### 5.  ω=kmω=\sqrt{\frac{k}{m}}ω=mk​​  the aim of the above formula is to find?

• distance
• displacement
• velocity
• acceleration
• angular frequency

• T=2/F
• T=1/F
• T=3/F
• T=4/F
• T=2F
• #### 7.  F=−kxF=−kxF=−kx  for the force acting on the block, the formula can now relate the spring constant k (a measure of the stiffness of the spring) to the mass of the block and the resulting angular frequency of what formula?

• k=mω2k=mω^2k=mω2
• k=mvk=\frac{m}{v}k=vm​
• k=ωmk=\frac{ω}{m}k=mω​
• m=kωm=kωm=kω
• m=kω2m=kω^2m=kω2
• #### 8.  Time duration of a pulse is given by

• Δν Δt≈1\Delta\nu\ \Delta t\approx1Δν Δt≈1
• Δω Δt≈1\Delta\omega\ \Delta t\approx1Δω Δt≈1
• Δν Δt≈2π\Delta\nu\ \Delta t\approx2\piΔν Δt≈2π
• Δν Δt ≈h2π\Delta\nu\ \Delta t\ \approx\frac{h}{2\pi}Δν Δt ≈2πh​
• #### 9.  Characteristic impedence is given by

• T0ρ0T_0\rho_0T0​ρ0​
• T0ρ0\frac{T_0}{\rho_0}ρ0​T0​​
• T0ρ0\sqrt{\frac{T_0}{\rho_0}}ρ0​T0​​​
• ρ0T0\sqrt{\rho_0T_0}ρ0​T0​​
• #### 10.  x=xmcos⁡(ωt+ϕ)x=xm\cos(ωt+ϕ)x=xmcos(ωt+ϕ)  What is  xmxmxm in above equation stand for?

• amplitude of the velocity
• amplitude of the distance
• amplitude of the displacement
• distance of the amplitude
• velocity of the amplitude
• #### 11.  The value of  xmxmxm   determines how far the particle moves in its oscillations and is called the amplitude of what?

• oscillations
• simple harmonic motion
• freeze-frames
• velocity
• distance
• #### 12.  v=−ωxmsin⁡(ωt+ϕ)v=−ωxm\sin(ωt+ϕ)v=−ωxmsin(ωt+ϕ)  the aim of the above formula is to find?

• distance
• displacement
• velocity
• acceleration
• angular velocity
• #### 13.  Group velocity is given by

• dωdk\frac{\text{d}\omega}{\text{d}k}dkdω​
• ωk\frac{\omega}{k}kω​
• v0kv_0kv0​k
• T0ρ0\sqrt{\frac{T_0}{\rho_0}}ρ0​T0​​​
• #### 14.  The acceleration of a particle in SHM is:

• always zero
• always constant
• maximum at amplitude
• maximum at the equilibrium position

• 3000 Hz
• 3000/2π Hz
• 0.74/2π Hz
• 3000/π Hz
• #### 16.  If the length of a simple pendulum is doubled, its period will:

• halve
• increase by a factor of sqrt(2)
• decrease by a factor of sqrt(2)
• double
• #### 17.  Refractive index is

• sin⁡ isin⁡ r\frac{\sin\ i}{\sin\ r}sin rsin i​
• cμϵ\frac{c}{\sqrt{\mu\epsilon}}μϵ​c​
• μϵ\sqrt{\mu\epsilon}μϵ​
• vϕc\frac{v_{\phi}}{c}cvϕ​​
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