Color depends on what characteristic of light? a) wavelengthb) frequencyc) both of these ( frequency x wavelength = speed )d) neither of these

a) Wavelength .

Explanation:

Visible light is comprised of all the seven colors Violet , Indigo , Blue , Green , Yellow and Red .

Color depends up on the wave length of the light .

For example a red ball appears red because it absorbs wavelengths of all the other colors and reflects only wavelengths corresponding to red color.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s