Answer:

Explanation:
Initial amplitude=
We are given that
Amplitude after 2 s=A=
We have to find the amplitude after 1 s.
We know that amplitude at any time t

Using the formula






When t=1 s

Answer:
Nanotechnology
Explanation:
is this for that crossword puzzle lol
Answer:
wave speed= constant
frequency = increase
wavelength = decrease
Explanation:
Solution:
- The three basic parameters of a wave are speed, frequency and wavelength. These three parameters are related to each other by an expression:
v = f * λ
Where,
- v is the speed of the wave in m/s.
- f frequency of the wave in Hz.
- λ wavelength of the wave in m
- We are asked how would each of these parameter change if we move the hand up and down faster. The hand moves from a crest to trough faster than before and back again. We can see that the time between a cycle has decreased; hence, frequency f increases. Consequently, we can see that wave speed v remains constant - the medium of transfer of wave energy - remains same. Then from our relation above if we hold speed constant and increase f then the wavelength λ would have to decrease.
By using a tangent line.
I need a bit more info to be sure but that's not wrong.