Answer:
C. The frequency stays the same and the wavelength decreases
Explanation:
The speed of a wave, 'v', is given as follows;
v = Frequency, f × Wavelength, λ
∴ v = f × λ
Therefore, the speed of the wave is directly proportional to the wavelength
v ∝ λ
When the speed of the sound wave increases as it enters a new medium, we have that frequency of the wave, which is determined at the source, remains the same, while the wavelength of the wave increases
As 'v' increases, λ increases
Therefore, for an increase in velocity of the wave, the frequency of the wave stays the same and the wavelength increases.
Took a test and the answer was that the water vapor had remained the same. (35.0 grams)
The correct answer is
A. The mechanical energy transforms to thermal energy as the pendulum slows and eventually stops moving.
In fact, we must keep in mind the presence of the air, which causes some resistance to the motion of the pendulum. As the pendulum moves through the air, part of its mechanical energy is transferred to the molecules of air because of the friction of this molecules with the surface of the pendulum. As a result, the pendulum slows down, and eventually stops. The initial energy of the pendulum has been converted into thermal energy of the molecules of air, which move faster now.