Which statements about this simple circuit are correct? Check as many as apply. Then put your statements together to form a complete description. Shannon is correct. A battery is a source of current. Cameron is correct. The chemical reactions in a battery maintain its potential difference. A wire is a conductor with electrons that are free to travel throughout. The wire gets hot because the conduction electrons collide with ions in the wire. Avi is correct. The chemical reactions in a battery are like a wood-burning fire: both are a source of heat. Shannon is correct. Batteries must be replaced when they can no longer supply current. A battery is a source of energy. Cameron is correct. A wire is not like a dry riverbed.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

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

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide