<span>Audible beats are formed by the interferences of two waves in which are from the slightly different frequencies which is letter a. It is because having two waves that consist of slightly different frequency causes or produce the audible beats to be formed in which they are beats that causes sound to be either loud or soft.</span>
Answer:
A sloping surface separating air masses that differ in temperature and moisture content is called a front.
Answer:
using the lens formula: 1/f = 1/u + 1/v
focal length f = -30 (negative because it is concave lens)
object distance u = 60
image distance v= unknown
1/-30 = 1/60 + 1/v
v = -20
So, the image is 20cm from lens (on the same side along with the object), and it is virtual (because of negative sign) and erect (concave lens must produce erect images).
Answer:
Yes, the water level in the glass will decrease as the icecubes melt, this is a due to water displacement.
Answer:
2 seconds
9.812 m/s²
9.7989 m/s²
Explanation:
L = Length of pendulum
g = Acceleration due to gravity
T = Time period would be 1+1 = 2 seconds
Time period is given by

The free fall acceleration in Cambridge is 9.812 m/s²

The free fall acceleration in Virginia Beach is 9.7989 m/s²