When two waves with different frequencies combine, two new waves are created, with frequencies at the sum and difference of the two original ones. The new ones are called the 'beats'.
Original two frequencies: 267.8 Hz, 266.4 Hz .
Beat at the sum = (267.8 + 266.4) = 534.2 Hz .
Beat at the difference = (267.8 - 266.4) = 1.4 Hz .
In this situation, we're typically not aware of the sum-beat at 534 Hz.
Our consciousness is flooded with the two original frequencies, and
with hearing the whole combined sound going "wah wah wah" at
1.4 times per second. But the 534-Hz note is there too ... part of
what makes the whole thing sound so ragged and discordant.
Answer:
1). Average speed = 1.5 m per second
2). Average velocity = 1.5 m per second
Explanation:
1). Since, speed is a scalar quantity
Therefore, average speed of the trip = 
From the graph attached,
Total distance covered = 10 + 10 + 20 + 0 + 20 + 30
= 90 meters
Total time taken = 60 seconds
Average speed = 
= 1.5 meter per second
2). Velocity is a vector quantity.
Therefore, average velocity = 
= 
= 
= 1.5 meter per second
Ivan Pavlov was the researcher that first realized that certain psychic secretions pointed to a simple but important form of learning.
The way he figured this out was when dogs paired certain things with food, and because of this, the dogs started salivating.
The primary sex organs for men are called testes and ovaries for the women. They produce sex cells called gametes and they secrete sex hormones.
