Use the concept of beat frequency to find the applicable final freqeuncy for 20Hz beat frequency.
Beat can be defined as 'the interference pattern between two sounds of slightly different frequencies0
The expression for beat frequency is given as
Where,
Final frequency
Initial frequency
The beat frequency for us is 25Hz and the initial frequency is 240Hz, then
Being an absolute value, two values are possible, both in addition and subtraction:
The two possible values are
Answer:
c
Explanation:
just trying to follow basic grammar.
Answer:
When a light wave hits a metallic surface, the electrons on the surface are pushed and ... in a process called "total internal reflection", making that surface look shiny too.
Explanation:
metallic shiny nonmetallic dull:)
The gravitational force exerted on the moon by the planet when the moon is at maximum distance
is
where G is the gravitational constant, M and m are the planet and moon masses, respectively. This is the minimum force, because the planet and the moon are at maximum distance.
Similary, the gravitational force at minimum distance is
And this is the maximum force, since the distance between planet and moon is minimum.
The problem says that
exceeds
by 11%. We can rewrite this as
Substituing the formulas of Fmin and Fmax, this equation translates into
and so, the ratio between the maximum and the minimum distance is
After they are all used up they can’t be renewed or used anymore.
