Speed of sound in water = 1500 m/s
frequency = 20Hz
wavelength = s/f = 1500/20 = 75m
The answer is A :)
both horseshoe crabs and spiders produce silk
Deciding how the world should be
Answer:
Sediment
Explanation:
Which of these could you find in the benthic zone of a lake? Sediment.
<span>The
correct answer is orthoptics.</span>
<span>Orthoptics is a profession of eye care that do things such as
diagnosis and non-surgical management of strabismus (wandering eye), amblyopia
(lazy eye) and eye movement disorders. Orthoptists are trained professionals
who are uniquely skilled in diagnostic techniques.</span>
