You want to precut a set of 1.16 Ω strips of 14.0 gauge copper wire (of diameter 1.628 mm).How long should each strip be?

Length of wire will be equal to 0.01436 m

Explanation:

We have given resistance R = 1.16 ohm

Diameter of the wire d = 1.628 mm

So radius

So cross sectional area

Electrical resistivity of copper

We have to find the length of the wire

We know that resistance is given by

So length of the wire will be equal to 0.01436 m

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

i would say