The frequency the student detect from waves omitted from the fork and waves coming from the wall is 348.1 Hz.
<h3>
Frequency detected by the student</h3>
The observed frequency is determined by applying Doppler effect;
f' = f₀(v + v₀)/(v)
where;
- f' is the observed frequency
- v is speed of sound
- v₀ is the source speed
- f₀ is the original frequency
f' = 342(6 + 336)/(336)
f' = 348.1 Hz
Thus, the frequency the student detect from waves omitted from the fork and waves coming from the wall is 348.1 Hz.
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Answer:
The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants.
Answer:
B.
Explanation:
The batteries make it so the chemical energy is being passed into the flashlight allowing it to work as designed forming light.
Answer:
Archimedes Principle states that "any body completely or partially submerged in water is acted upon by an upthrust force which is equal to the magnitude of Weight of the body."
Answer:
Time taken, 
Explanation:
It is given that, a small metal ball is suspended from the ceiling by a thread of negligible mass. The ball is then set in motion in a horizontal circle so that the thread’s trajectory describes a cone as shown in attached figure.
From the figure,
The sum of forces in y direction is :
Sum of forces in x direction,
.............(1)
Also, 
Equation (1) becomes :
...............(2)
Let t is the time taken for the ball to rotate once around the axis. It is given by :
Put the value of T from equation (2) to the above expression:
On solving above equation :
Hence, this is the required solution.
