Iwill make you ! ! 5 stars! easy question 6th !
how is the chesapeake bay crater, united states (north america) hidden?

The sedimentary walls of the crater progressively slumped in, widened the crater, and formed a layer of huge blocks on the floor of the ring-like trough.

The slump blocks were then covered with the rubble or breccia.

The entire bolide event, from initial impact to the termination of breccia deposition, lasted only a few hours or days.

In the perspective of geological time, the 0.75 mi (1.2 km) breccia is an instantaneous deposit.

The crater was then buried by additional sedimentary beds that have accumulated during the 35 million years following the impact.

Hope this helps!

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