A child plays with a stone tied to a string and starts swinging it in a circle of radius 2 m at a constant speed of 8 m/s. Calculate the
centripetal acceleration of the stone.

c)as speed changes, wavelength and frequency change.

everything changes!

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it

answer: the correct answer for the fill in the blank is rods.

rods are the specialized photoreceptor cells that are present in the retina of human eye. they are responsible for vision in the night time ( also called scotopic vision). they have very low visual acuity and color distinguishing ability.

as they are responsible for vision in night time, therefore they are found predominantly in the nocturnal animals.