I believe the answer is the second one.
Answer: The wavelength changes by a factor of
Explanation:
The equation of the speed of a wave is:
Where:
is the speed, that remains unchanged
is the wavelength
is the frequency
Isolating we have:
Now, if we increase the frequency by a factor of 2:
This means the wavelength changes by a factor of
Answer:
Time, t = 0.25 seconds
Explanation:
Given that,
Force applied by a baseball player, F = 200 N
We need to find the time that baseball player exerts on the baseball if an impulse of 50 Ns is exerted on the baseball. The impulse exerted on the baseball is given by :
t is time taken
So, the time for which the baseball player exerts on the baseball is 0.25 seconds.