Answer:
The velocity (
) of the wave is 3.08 
.
Explanation:
According to the figure, the distance (
) between a trough and its adjacent crest is 
. Also the wavelength (
) of the wave is 
. Pepe and Alfredo count 11 crests to pass the raft in 
= 21.5 s.
So, the time period (
) of oscillation of the wave is
So, the velocity (
) of the wave is
Answer:
(a) The convex mirror image, is always upright at all positions, while images formed by concave mirrors are always inverted when the object distance from the mirror is more than the mirrors focal length.
(b) An upright image is not seen for object at a distance from a concave mirror further than the focal length of the mirror, which is the spoon in the question
Therefore, the location of her eyes of approximately, 30 cm, from the mirror is more than the mirror's focal length
Explanation:
Answer:
if you look it up i think u can find it it could be a mealltiod Co 27
Explanation:
Let us consider two vectors A and B.
As per the question, the two vectors are perpendicular to each other.
Hence the angle between them 
We are asked to calculate the resultant of these two vectors.
As per parallelogram law of vector addition, the resultant of two vectors are-
[cos90=0]
This is the way by which we can add two perpendicular vectors.
Answer: you cant see sound waves but youcan defiently hear them . when the travle through difrent levels they depend on how loud the sound wave is if you hear a loud sound its called a loud sound wave
Explanation:
