Order the electromagnetic waves from lowest frequency (1) to highest (4).

Gamma:  4

Infrared:  1

X-ray:  3

Visible light: 2

Explanation:

Because Gamma has the lowest wavelength it inversely has the highest frequency Infrared has the LONGEST wavelength so it will have the LOWEST frequency... of the choices provided

the answer for apex is the lowest

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