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

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption