According to the spectrum seen below, which set of photons were absorbed by the element? 2 eV, 4 eV, 7 eV, and 14 eV
1 eV, 3 eV, 4 eV, and 6 eV
2 eV, 3 eV, and 4 eV
2 eV, 5 eV, 8 eV, and 15 eV

show the wavelengths of a wave. show the crests of a wave.

0.19 m/s and 0.45 m/s

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