Higher-frequency sound waves are perceived as having a higher pitch. This is because the pitch of a sound, which our brains perceive as either high or low, is directly related to the frequency of the sound wave. Finally, the volume or loudness of a sound is related to the amplitude of the wave, not its frequency.
Higher-frequency sound waves are perceived as having a A. higher pitch.
The pitch of a sound is directly related to its frequency. In other words, as the frequency of a sound wave increases, the pitch that we hear also increases. Thus, sounds with higher frequencies are heard as having a higher pitch. This is why when you tune a musical instrument, increasing the tension of a string will increase its frequency of vibration, producing a higher pitch.
On the other hand, volume, also known as loudness, is related to the amplitude of sound waves, not their frequency. So higher-frequency sound waves are not necessarily louder or softer, their volume depends on other factors such as the amplitude of the wave.
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The pulley increases the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
B.
The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
C.
The pulley increases the force needed to lift the load by moving it over a shorter distance. It also changes the direction of the force. As the input force is applied upward, the output force is exerted downward.
D.
The pulley reduces the force needed to lift the load by moving it over a shorter distance. It also changes the direction of the force. As the input force is applied upward, the output force is exerted downward.
Answer:
B.
The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
Explanation:
When we use pulley system to pull the heavy weight then it is easier to pull the weight upwards because while we use use pulley to pull the objects then the force that is applied on the string is exerted at some angle with the vertical
Due to this we need to apply force at some angle with the vertical and it increase the output force on the object which is to be pulled
So here our effort is in downward direction to pull the object in upward direction
so correct answer will be
B.
The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
Answer
The index of refraction of medium is 1.5 .
Explanation:
Equation for index of refraction is given by .
Where n is index of refraction in medium , v is speed of light in the medium and c is the speed of light in air .
As given
Light traveling through air at m/s reaches an unknown medium and slows down to m/s.
Putting the values in the formula
Solving the above
n = 1.5
Therefore the index of refraction of medium is 1.5 .
Answer:
31.6
Explanation:
velocity÷ time
212 ÷ 6.7 = 31.6m/s
Question 2 options:
True
False