Waves Questions and Answers

A physics student constantly swings a slinky side to side, with an amplitude of 20 cm. This motion generates a standing wave. How could that standing wave be described? antinodes = 20 cm, nodes = 0 cm, wavelength = 1.5 λ antinodes = 40 cm, nodes = 0 cm, wavelength = 1.5 λ antinodes = 20 cm, nodes = 0 cm, wavelength = 1.75 λ antinodes = 40 cm, nodes = 0 cm, wavelength = 1.75 λ

Using academic language, describe the cause and effect relationship between: 1) Frequency and wave speed when wavelength is constant 2) Frequency and wavelength when wave speed is constant

Water waves travel from a region of known depth to a region of unknown depth at an oblique angle. What two observations can be made from the surface waves to indicate whether the unknown region is deeper or shallower than the known region? Describe these in detail. [T/I=1]

Which of the following are true? Check all that apply. The Earth moves through a fluid called luminiferous aether. The length of an object would be zero if the object were moving at the speed of light. The passage of time is constant and independent of the speed of the source or observer. The speed of light is constant and independent of the source or the observer.

A tuning fork vibrates at a frequency of 264 Hz, and the tip of each prong moves 1.8 mm to either side of center. Calculate the maximum speed of the tip of the prong. 3 m/s 4 m/s 5 m/s 2 m/s

Mr. H creates a standing wave pattern in a snakey by vibrating it up and down 23 times in 9 seconds in a physics demonstration. Gerald is holding the opposite end of the snakey and is 7 meters away from Mr. H. The snakey is divided into 4 equal- length portions, each inhabited by an antinode. Determine the speed of the wave.

The frequency of yellow light is 5.08 x 10^14 Hz. How much energy does a photon of yellow light carry? (h = 6.626 x 10-34 J-s; 1 eV = 1.60 x 10-1⁹ J) 4.38 x 10-19 J 5.38 x 10-22 J 2.11 x 10-20 J 3.37 x 10-19 J

6. Which of these scientists is most known for their postulate that all matter can exhibit wave-like behavior? Planck Einstein Young De Broglie

How does two-point interference demonstrate that light behaves as a wave?

14. The equation of motion of a particle undergoing simple harmonic motion in the y direction is y = (2.0 cm) sin(0.60 s1 t). At time t = 0.60 s determine the particle's (a) position, (b) velocity, and (c) acceleration.

The 2011 Tōhoku, Japan earthquake is the newest deadliest earthquake. The power was equal as about 600.000.000 Hiroshima bomb. After the 9.0 magnitude earthquake, 900 aftershocks emerged and around 13,705 casualties had to lose their lives during the course. Because the earthquake so powerful, it has shifted our earth axis by 25 cm. Whereas in 2017 Mexico earthquake of 8.2 on the Richter scale. This was on of the most devastating earthquakes. Based on this information, arrive to the conclusion on how much stronger was this earthquake in comparison with 2017 Mexico earthquake. Show work.

Find the wavelength of a wave (in meters) whose frequency is 3.3 Hz and which travels at 10 meters/second. Enter a numerical answer.

14. A sewing machine needle moves in simple harmonic motion with a frequency of 2.5 Hz and an amplitude of 1.27 cm. (a) How long does it take the tip of the needle to move from the highest point to the lowest point in its travel? (b) How long does it take the needle tip to travel a total distance of 11.43 cm?

You perform the Simple Harmonic Motion experiment and create a plot of Period-Squared vs. Mass. You add a linear fit and find the following equation of the line: y=8.22x-0.062 What is the spring constant, k (in N/m or kg/s²)?

The first overtone of an open organ pipe beats with the first overtone of a closed organ pipe with a beat frequency of 2.2 Hz. The fundamental frequency of the closed organ pipe is 110 Hz. Find the lengths of the pipes.

Which of the following is TRUE about anger? The purpose of anger is to produce a response that removes a conflict, hurt, or threat. Anger is a behavior, not an emotion. Anger usually lasts a long time. Anger is an abnormal response to injury, injustice, conflict, or hurt.

A small mass m, attached to one end of a spring with a negligible mass and an unstretched length L, executes vertical oscillation with angular frequency wo. When the mass is rotated with an angular speed w by holding the other end of the spring at a fixed point, the mass moves uniformly in a circular path in a horizontal plane. Then the increase in length of the spring during the rotation is:

Figure shown as block of mass m resting on a smooth horizontal ground attached to one end of a spring of force constant k in natural length. If another block of same mass and moving with a velocity u toward right is placed on the block which stick to it due to friction. The time it will take to reach its extreme position. Also find the amplitude of oscillations of the combined mass 2m

Monochromatic light from a helium-neon laser (wavelength 561 nm) is incident nor- mally on a diffraction grating containing 5278 lines/cm. Find the angle at which the first-order max- imum can be observed. Answer in units of ". 004 (part 2 of 2) 10.0 points Calculate the angle at which the second-order maximum can be observed. Answer in units of ".

For a transverse wave on a string, the shape of the wave is described by y = (x²+2)-1 Which one of the following equations represents this wave traveling in the positive direction at a speed of 2 units per second? a. y=(x²+2+2t)-1 b. y = [(x - 2)² + 2]-1 c. y = (x² - 2t+2)-1 d y=[x² - 2]^-1

The mathematical representation of a standing wave is... y = (0.5m)sin(3TTt)sin (2TTx), with x in meters and t in seconds. What is the x-coordinate of the antinode closest to the origin (x > 0)? a. 0.125 m b.0.167 m c. 0.250 m d. 0.333 m

A sinusoidal wave has period 0.15 s and wavelength 2.5 m .What is the wave speed?

A stationary boat in the ocean is experiencing waves from a storm. The waves move at 58 km/h and have a wavelength of 140 m. The boat is at the crest of a wave. How much time elapses until the boat is first at the trough of a wave?

How many beats per second are heard when two vibrating tuning forks having frequencies of 216 Hz and 224 Hz are held side by side? Select one: a. 3 Hz b. 9 Hz c. 6 Hz d. 8 Hz

Two identical waves are traveling toward each other in the same medium. One has a positive amplitude, meaning that its peaks only go upward, and the other wave has a negative amplitude, with peaks going downward. What will occur when the waves peak at the same place at the same time? constructive interference destructive interference a reflecting wave wave refraction

5b. A student makes a claim that a piece of wood on top of an ocean wave stays in the same location, only moving up and down as the wave passes. It is energy that moves toward the shore. Do you accept or reject this student's claim, Explain your answer. (3 points)

Carrie is making a presentation on solar winds. Her notes of the steps that must occur for solar winds to form are below. 1. The stream of electrically charged particles collide with gas atoms, causing the latter to give off light. 2. The electrically charged particles flow outward in all directions as far as Saturn. 3. The stream of electrically charged particles flows outward from the corona. 4. The particles of the solar wind flow along lines of the magnetic field. Which shows the correct sequence in the formation of solar winds? 1, 2, 3, 4 2, 3, 4, 1 3, 2, 4, 1 4, 2, 1, 3.

waves have the largest wavelength within the electromagnetic spectrum.

Which diagram below depicts the correct pattern of sound waves for a car approaching an observer at a constant speed with the horn depressed? Select one: a. A b. B C. C d. D

The highest directly measured frequency is 5.2x10¹4Hz, corresponding to one of the transitions in iodine-127. How many wavelengths of electromagnetic waves with this frequency could fit across a dot on a book page? Assume the dot is 2x104m in diameter. Answer:

A new antiterrorist technique detects the differences in electromagnetic waves emitted by humans and by weapons made of metal, plastic, or ceramic. One possible range of wavelengths used with this technique is 2mm to 5mm. Assuming the wavelength is .002 m, what is the associated frequency? Select one: a. 1.5x10¹0 Hz b. 6x10¹0 Hz c. 1.5x10¹¹ Hz d. 6x10¹¹ Hz

Commercial trucks cause about 18,000 lane-change and merging accidents per year in the United States. To prevent many of them, a warning system covering blind spots is being developed. The system uses electromagnetic waves of frequency 2.4x100Hz. What is the wavelength of these waves? Answer:

III Go to Two Source Interference tab. 1) What happens when you move the man back and forth? Why? 2) What happens to the sound when there are two sources? 3) What type(s) of waves behaviors are you observing here?

Sound waves Select one: a. are longitudinal waves. b. are transverse waves. c. are a part of the electromagnetic spectrum. d. do not require a medium for transmission.

Suppose you set your watch by the sound of the noon whistle from a factory 3km away. Compared to the correct time, your watch will be behind. Select one: True False

Consider the diagram below of several circular waves created at various times and locations. The diagram illustrates Select one: a. refraction b. interference c, a sonic boom d. the Doppler effect

As two or more waves pass simultaneously through the same region, ____ can occur. Select one: a. reflection b. diffraction e. interference d. refraction

An object is vibrating at its natural frequency. Repeated and periodic vibrations of the same natural frequency impinge upon the vibrating object and the amplitude of its vibrations are observed to increase. This phenomenon is known as Select one: a. overtones b. interference c. resonance Od. fundamentalism Oe. beats

An emergency vehicle has its siren on and is moving east along Shea Blvd at a constant speed. Samantha is riding her bicycle west along Shea Blvd at a constant speed. The emergency vehicle is approaching Samantha Compared to the frequency of sound waves produced by the siren, the frequency that Samantha hears is. Select one: a. lower b. higher c. the same d. none of these

The frequency of wave A is 250 hertz and the wavelength is 30 centimeters. The frequency of wave B is 260 hertz and the wavelength is 25 centimeters. What is the speed of the faster wave in m/s?

When comparing the wave characteristics of a wave in two different ropes, one can be sure that the wavelength and speed will be Select one: a. smallest in the least dense medium b. the same regardless of the density of the medium c. greatest in the least dense medium.

Consider Diagram A and Diagram B below: Compared to the wave in Diagram B, the wave in Diagram A has Select one: a. a smaller amplitude and the same wavelength b. the same amplitude and a smaller wavelength c. a larger amplitude and a smaller wavelength d. the same amplitude by a larger wavelength

An elastic rope is tied securely to a wall. An upward-displaced pulse is introduced into the rope. The pulse travels through the rope, reaches the boundary with the wall and reflects. The reflected pulse will be Select one: a. inverted (displaced downwards) b. either inverted or upright, depending upon its amplitude c. upright (displaced upwards)

Match the following wave quantities to the mini-definition. How fast the wave moves through the medium. How long the wave is. How often the particles vibrate about their fixed position. How much time it takes the particles to complete a vibrational cycle. How far the particles vibrate away from their resting position.

Refracted sound that bends away from the normal is sound that has Select one: a. slowed down. b. nearly been absorbed. c. diffracted. d. speeded up.

A wave is present in a slinky. A coil of the slinky makes 12 complete up and down cycles of vibration in a total time of 4 seconds. The period of this wave is seconds and the frequency is Hertz.

How long is the wavelength of KAJA radio whose broadcast frequency is 97.1 MHz? (97.1 MHz -97,100,000 Hz and v =300,000,000 m

The two pulses shown at the right are moving in opposite directions along the same medium. When they meet,__ interference will occur. Select one: a. doppler b. resonant c. destructive d. constructive

Two waves meet and interfere constructively. Which one of the following factors increases? Select one: a. amplitude b. period c. frequency d. wavelength

The diagram above represents two pulse waves moving toward each other through a medium. The two waves will exactly coincide when they reach point A. At point A, the amplitude of the combined waves will be Select one: a. half that of either wave alone. b. zero. c. the same as either wave alone. d. twice that of either wave alone.