No, Their arms and back legs are too short, but the mesosaurus was also a coastal animal! It's very unlikely.
Answer:
4 longitudinal waves
Explanation:
have a beautiful day ahead
Answer:
Wavelength, 
Explanation:
Given that,
Mass of the particle, 
Acceleration of the particle, 
Time, t = 5 s
It starts from rest, u = 0
The De Broglie wavelength is given by :

v = a × t



Hence, this is the required solution.
I'm pretty sure its simple! I hope this helps
Speed v = distance travelled / time taken
v = d / t
v = 540 / 60h
v = 9 km /h