14. in 1805, rear-admiral beaufort created
a numerical scale to sailors quickly
assess the strength of the wind. the
integer scale ranges from 0 to 12. the wind
scale, b, is related to the wind velocity, v,
in kilometres per hour, by the formula
b = 1.33vv + 10.0 – 3.49, v 2 -10.
a) determine the wind scale for a wind
velocity of 40 km/h. v
one of
e an
asoning.

terd muffin is the correct answer

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

answerdmitry mendeleyev made a workable classification of the elements