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Physics B All Questions And Answers 100% Guaranteed Success.

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*Vibrations and Waves* - correct answer. *Periodic Motion*

A mass-spring system can oscillate with simple harmonic motion because a
compressed or stretched spring has which kind of energy? - correct answer. Elastic
Potential

The motion of a metronome is an example of simple harmonic motion. - correct answer.
True.

The potential energy of a spring can be calculated using the formula PE⬇ (sp) =
(1/2)kx^2 - correct answer. True.

Vibration of an object about an equilibrium point is called simple harmonic motion when
the restoring force is proportional to - correct answer. displacement.

By what factor should the length of a simple pendulum be changed in order to triple the
period of vibration? - correct answer. 9

For a system in simple harmonic motion, which of the following is the time required to
complete a cycle of motion? - correct answer. Period

For a mass hanging from a spring, the maximum displacement the spring is stretched or
compressed from its equilibrium position is the system's - correct answer. amplitude.

The angle between the string of a pendulum at its equilibrium position and at its
maximum displacement is the pendulum's - correct answer. amplitude.

A mass attached to a string swings back and forth. The maximum displacement from
equilibrium is the ____________. - correct answer. amplitude

In the equation for Hooke's Law, F⬇ (elastic) = -kx, the term k represents the spring
constant of a spring. - correct answer. True.

,A pendulum swings through a total of 28 degrees. If the displacement is equal on each
side of the equilibrium position, what is the amplitude of this vibration? (Disregard
frictional forces acting on the pendulum.) - correct answer. 14 degrees.

Which of the following is not an example of approximate simple harmonic motion? -
correct answer.

(Add rest of attempt 1 to set) - correct answer.

*Vibrations and Waves* - correct answer. *Wave Properties*

Which of the following most affects the wavelength of a mechanical wave moving
through a medium? Assume that the frequency of the wave remains constant. - correct
answer. the nature of the medium.

A periodic wave has a wavelength of 0.50 m and a speed of 20 m/s. What is the wave
frequency? - correct answer. 40 Hz

A(n)_____________ wave is produced by vibrating electrons in atoms on the Sun's
surface and can transmit its energy through a vacuum. A(n) ___________ wave is not
capable of transmitting its energy through a vacuum. - correct answer.
electromagnetic, mechanical.

What is the speed of a periodic wave that has a frequency of 3.50 Hz and a wavelength
of 0.700 m? - correct answer. 2.45 m/s

Suppose that two sound waves passing through the same medium have different
wavelengths. Which of the following is most likely to be the reason for the differing
wavelengths? - correct answer. differences in frequency

What is true of waves? - correct answer. Both a and b.
A. In a wave, energy is transported from one end of a medium to the other.
B. A wave does not transport matter.

The relationship between period and frequency is represented by the following
equation: frequency = 1/period or period = 1/frequency. - correct answer. true.

Five pulses are generated every 0.100 s in a tank of water. If the wavelength of the
surface wave is 1.20 cm, what is the speed of propagation of the wave? - correct
answer. 0.162 m/s (wrong)

The frequency of a wave increases when there are more oscillations per unit time. -
correct answer. True.

What is true of transverse waves? - correct answer. Transverse waves travel through
a medium.

, Chris and Desiree are resting on an offshore raft after a swim. They estimate that 3.0 m
separates the trough from the adjacent crest of each surface wave on the lake. They
count 12 crests that pass by the raft in 20.0 s. How fast are the waves moving? -
correct answer. 3.6 m/s

One end of a taut rope is fixed to a post. What type of wave is produced if the free end
is quickly raised and lowered one time? - correct answer. pulse wave

A wave travels through a medium. As the wave passes, the particles of the medium
vibrate in a direction perpendicular to the direction of the wave's motion. The wave is -
correct answer. transverse

A hiker shouts toward a vertical cliff 465 m away. The echo is heard 2.75 s later.The
wavelength of the sound is 0.750 m. What is its frequency? - correct answer. 451 Hz

Radio waves from an FM station have a frequency of 103.1 MHz. If the waves travel
with a speed of 3.00 x 10^8 m/s, what is the wavelength? - correct answer. 2.91 m

A pulse wave is a single traveling disturbance resulting from a motion that is not
repeated, while a periodic wave is one whose source is repeated motion. - correct
answer. True.

*Vibrations and Waves* - correct answer. *Wave Behavior*

The superposition of mechanical waves can be observed in the movement of - correct
answer. water waves in a ripple tank.

What is true about standing waves? - correct answer. Both a and b.
A. In a standing wave reflected waves from one end of the medium interfere with
incident waves from the source.
B. Standing waves only occur at certain frequencies.

A student sends a pulse traveling on a taut rope with one end attached to a post. What
will the student observe? - correct answer. The pulse will be reflected and inverted if
the rope is fixed to the post.

Waves arriving at a fixed boundary are - correct answer. reflected and inverted.

The wave speed in a taut string is 265 m/s. The length of the string is 63 cm. You pluck
the center of the string by pulling it up and letting go. Pulses move in both directions and
are reflected off the ends of the string. How long does it take for the pulse to move to
the string end and return to the center? - correct answer. 2.4 x 10^-3 s

Which of the following describes a standing wave? - correct answer. identical waves
opposite direction, same medium

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