Physics Waves And Oscillations Level: High School
Resonance
Resonance of sound waves can be produced within an aluminum rod by holding the rod at its midpoint and stroking it with an alcohol-saturated paper towel . In this resonance mode , the middle of the rod is a node while the ends are antinodes ; no other nodes or antinodes are present . What is the frequency of the resonance if the rod is 1.00 m long ?
Physics Waves And Oscillations Level: High School
Intensity of sound
An outside loudspeaker (considered a small source) emits sound wave with a power output of 100 W .a) Find the intensity 10.0 m from the source .
b) Find the intensity level in decibels at that distance .
c) At what distance would you experiment the sound at the threshold of pain , 120 dB ?
Physics Waves And Oscillations Level: High School
Intensity of sound
Two sounds have measured intensities of I1 = 100 W/m squared and I2 = 200 W/m squared . By how many decibels is the level of sound 1 lower than that of sound 2 ?
Physics Waves And Oscillations Level: High School
Intensity of sound
The toadfish makes use of resonance in a closed tube to produce very loud sounds . The tube is its swim bladder , used as an amplifier . The sound level of this creature has been measured as high as 100 dB .a) Calculate the intensity of the sound wave emitted
b) What is the intensity level if three of these fish try to imitate three frogs by saying “Budweiser” at the same time .
Physics Waves And Oscillations Level: High School
The range of human hearing extends from 20 Hz to the 20000 Hz . Find the wavelengths of these extremes at a temperature of 27 degrees C .
Physics Waves And Oscillations Level: High School
Sound
Suppose that you hear a clap of thunder 16.2 s after seeing the associated lightning stroke . The speed of sound wave in air is 343 m/s and the speed of light in air is 3.00 x 10 to the eighth power m/s . How far are you from the lightning stroke ?
Physics Waves And Oscillations Level: High School
Stationary wave
A circus performer stretched s tightrope between two towers . He strike one end of the rope and sends a wave along it toward to the other tower . He notes that it takes the wave 0.800 s to reach the opposite tower 20.0 m away . If a 1-m length of the rope has a mass of 0.350 kg . Find tension in the tightrope .
Physics Waves And Oscillations Level: High School
If the frequency of oscillation of the wave emitted by an FM radio station is 88.0 MHz . determine ,a) The wave’s period of vibration
b) Its wavelength .(Radio wave travels at the speed of light)
Physics Heat & Thermodynamics Level: High School
If n moles of an ideal gas are compressed isothermally from an initial volume V1 to a final volume V2 , the change in entropy isa) nR In (V2/V1)
b) nRT In (V2/V1
c) nk In (V2/V1)
d) nCv/T
Physics Heat & Thermodynamics Level: High School
The relation PV = nRT holds for all ideal gases . The additional relation (PV = constant ) holds for an adiabatic process . The figure below shows two curves : one is an adiabat and the other is an isotherm . Each starts at the same pressure and volume . Which statement is correct ( Note : ‘tidel’ means is proportional to.)a) Isotherm : P tidel 1/V ; Adiabet : P tidel 1/V; B is both isotherm and an adiabet .
b) Isotherm : P tidel 1/V ; Adiabat : P tidel 1/V ; A is an isotherm , B is an adiabat .
c) Isotherm : P tidel 1/V ; Adiabat : P tidel 1/V ; B is an isotherm , A is an adiabat .
d) Isotherm : P tidel 1/V; Adiabat : P tidel 1/V; A is both an isotherm and an adiatbat .
e) Cannot answer this without additional information about the starting temperature .
Physics Heat & Thermodynamics Level: High School
A molecule in a uniform ideal gas can collide with other molecules when their center are equal to or less than :a) One radius away from center .
b) One diameter away from center .
c) Two diameter away from its center .
d) Twice the cube root of volume away from its center .
e) Sqrt 3 diameters away from its center .
Physics Heat & Thermodynamics Level: High School
Assume 3 moles of a diatomic gas has an internal energy of 10 kJ . Determine the temperature of the gas after it has reached equilibrium .
Physics Waves And Oscillations Level: High School
A man enters a toll tower , needing to know its height . He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 15.5 s .a) How tall is the tower ?
b) If this pendulum is taken to the moon where the free-fall acceleration is 1.67 m/s squared , What is the period there ?
Physics Waves And Oscillations Level: High School
Simple harmonic motion
A sample harmonic oscillator has a total energy E .a) Determine the kinetic and potential energies when the displacement is one-half the amplitude
b) For what value of the displacement does the kinetic energy equal the potential energy ?
Physics Work,Power & Energy Level: High School
A slingshot consist of a light leather cup containing a stone . The cup is pulled back against two parallel rubber bands . It takes a force of 15 N stretch either one of these bands 1.0 cma) What is the potential energy stored in the two bands together when a 50 g stone is placed in the cup and pulled back 0.20 m from the equilibrium position ?
b) With what speed does the stone leave the slingshot ?
