Answer:
The sound travels at 
Option: c
Explanation:
Unknown source plays of middle C (fs) = 262 Hz
The sound wave from this source have to travel to raise the pitch to C sharp is (fd) = 272 Hz






Substitute the given values in the formula,




Therefore, The sound travels at 
The answer for this would be B!!
Answer:
The exoplanet Kepler-39b
Explanation:
At 18 times the mass of Jupiter making Kepler-39b bigger
Answer:
0.857 cm
Explanation:
We are given that:
The focal length for a convex lens to be (f) = 1.5cm
The object distance (u) = - 2.0 cm
We are to determine the image distance (v) = ??? cm
By applying the lens formula:

By rearrangement and making (v) the subject of the above formula:

replacing the given values:


v = 0.857 cm