Aperson holds a portable fire extinguisher that ejects 1.0kg of water per second horizontally at a speed of 6.0 m/s. what newtons must the person exert on the extinguisher in order to prevent it from accelerating?

(a) 0n
(b) 6n
(c) i0n
(d) 18n
(e) 36n

6 N

Explanation:

= Mass flow rate = 1 kg/s

v = Final velocity = 6 m/s

u = Initial velocity = 0 m/s

Force is obtained when we divide change in momentum by time

The force the person exert on the extinguisher in order to prevent it from accelerating is 6 N

i think they are all correct

explanation:

they seem good

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.