1.How many vibrations per second are represented in a radio wave of 101.7 MHz
2.The speed of a wave on a string depends on:
a.the material properties of the string
b. the amplitude of the wave
c.both
3.The time interval for one repetition of the cycle in simple harmonic motion is called the
a.period
b.amplitude
c.phase
d.frequency
1. Hint: 1 MHz = 1 million vibrations per second.
2. Hint: It isn't b
3. Hint: which answer has dimensions of time?
Please give us an idea of your thought process when posting questions. You won't learn any physcs by having someone else do your multiple choice "concept" questions.
3) period
1. To calculate the number of vibrations per second in a radio wave of 101.7 MHz, you can use the formula:
Frequency = Number of vibrations / Time
The frequency of the radio wave is given as 101.7 MHz, which means 101.7 million cycles per second. So, we can write the equation as:
101.7 million cycles/second = Number of vibrations / 1 second
By rearranging the equation, we can calculate the number of vibrations:
Number of vibrations = 101.7 million cycles/second
Therefore, a radio wave of 101.7 MHz represents 101.7 million vibrations per second.
2. The speed of a wave on a string depends on the material properties of the string. So, the correct answer is a.
The amplitude of the wave does not affect the speed of the wave on a string, so option b is incorrect. The speed is determined solely by the properties of the string material.
3. The time interval for one repetition of the cycle in simple harmonic motion is called the period. So, the correct answer is a.
Amplitude refers to the maximum displacement from the equilibrium position and is not related to the time interval. Phase refers to the position of the particle in its oscillatory motion. Frequency refers to the number of cycles per second.
1. To determine the number of vibrations per second represented in a radio wave of 101.7 MHz, we can use the equation:
Frequency = Number of vibrations per second
Since 1 MHz is equivalent to 1 million (1,000,000) hertz (Hz), we can convert 101.7 MHz to Hz:
101.7 MHz = 101.7 million Hz
Therefore, the radio wave has a frequency of 101.7 million vibrations per second.
2. The speed of a wave on a string depends on both the material properties of the string and the amplitude of the wave.
The material properties of the string, such as its density, tension, and elasticity, determine how fast the wave propagates through the string. Different materials will have different wave speeds.
The amplitude of the wave, on the other hand, affects the energy and intensity of the wave but does not directly influence the wave speed.
Therefore, the correct answer is c. both the material properties of the string and the amplitude of the wave.
3. The time interval for one repetition of the cycle in simple harmonic motion is called the period.
The period represents the time it takes for an object undergoing simple harmonic motion to complete one full cycle, starting from its initial position, reaching its maximum displacement in one direction, returning to its initial position, and reaching the maximum displacement in the opposite direction. It is usually denoted by the symbol "T".
The amplitude refers to the maximum displacement or distance from the equilibrium position in a wave or oscillating motion.
Phase refers to the position of an object at a specific point in its cycle, usually measured in degrees or radians.
Frequency represents the number of complete cycles or oscillations of an object per unit of time, typically measured in hertz (Hz).
Therefore, the correct answer is a. period.