Answer:
192.6 Hz
Explanation:
v = Velocity of sound in air = 335 m/s
Actual frequency = 200 Hz = f
Observed frequency = 208 Hz =
Speed of train =
Doppler effect when the source is moving towards observer
Doppler effect when the source is moving away from observer
∴ Frequency he observes as the train moves away is 192.6 Hz
Scientists study contrast sensitivity for
sine wave gratings across many different spatial frequencies because:
<span>Patterns of stripes with fuzzy boundaries are common in the real world.</span>
<span>Sine wave is a continuous wave. The smooth repetitive oscillations are
described in Sine waves and stripes are lines or bands.</span>
Answer:
B. MASS & MATTER
Explanation:
Newton's law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them. Objects with greater mass have a stronger force of gravity between them.
Roygbv evjnefvvnefv ekfv k kn ke nv
Answer:
...as the height of an object increases, gravitational potential energy also increases