Answer:
Option D. 23.5 m
Explanation:
From the question given above, the following data were obtained:
Frequency = 200 Hz
Speed of sound in brass = 4700 m/s
Wavelength of sound in brass =?
We can obtain the wavelength of the sound in the brass by using the following formula as illustrated below:
Wave speed = wavelength × frequency
4700 = wavelength × 200
Divide both side by 200
Wavelength = 4700 / 200
Wavelength = 23.5 m
Thus, the wavelength of the sound in the brass is 23.5 m
B, is older
Because if you look on the scale b is deeper
Answer:
Cost = 40 fills
Explanation:
First, we will calculate the total power consumed by all appliances:
Now, we will calculate the energy required:
Now, for the cost we use the following formula:
<u>Cost = 40 fills</u>
Answer:
The object will accelerate in the upward direction.
Explanation:
To know the direction in which the object will accelerate, we shall determine the net force acting on the object. This can be obtained as follow:
Upward force (Fᵤ) = 300 N
Downward force (Fₔ) = 200 N
Net force (Fₙ) =?
Fₙ = Fᵤ – Fₔ
Fₙ = 300 – 200
Fₙ = 100 N upward
Thus, the net force acting on the object is 100 N in the upward direction. This implies that the object will accelerate in the upward direction because the net force acting on the object is in the upward direction.
