It is impossible for an object to have a charge of 1.8 x 10^-20 C.

1)True
2)False

1) True, that charge is not possible

To get e=1.6X10^-20 you need to multiply 1.6X10^-19 by 1/10 (=n)

but 1/10 is not integer.

learn it on the intertant so you can solve

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