After touchdown a fighter jet passes a marker on the runway at an instantaneous speed of 100 m/s and constant negative acceleration of -15 m/s2. after slowing down to 25 m/s, the pilot suddenly goes to full power to provide a new constant acceleration of 40 m/s2 for a "touch and go" takeoff. how far from the original runway marker does the plane achieve its takeoff speed of 162 m/s?

632 m.

Explanation:

We can divide the problem (and hence the total displacement over the runway) in two parts:

1) The information that we have, is the initial velocity, the acceleration value, and the final value for the velocity during this part.

So, applying acceleration definition, we can find the time used in order to travel this part, as follows:

a = (vf - v₀) / t ⇒ t = (vf-v₀) / a = (25 m/s -100 m/s) / -15 m/s² = 5 s

Now, we can replace this value in the kinematic equation for displacement:

x = v₀ . t + 1/2 a t²

Replacing by the values, we get:

x= 100 m/s. 5s + 1/2 (-15 m/s²). (5²) s² = 500 m - 188 m = 312 m.

2) For this part, we have the values of acceleration, and of the final and initial velocity values, so we can find again the time for this part:

t = 3.43 s

Replacing in the equation for displacement, we have the distance traveled in this second part:

x = 25 m/s. (3.43s) + 1/2 (40 m/s²). (3.43)² s² = 320 m.

Explanation:

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.