In january 2004, nasa landed exploration vehicles on mars. part of the descent consisted of the following stages:
stage a: friction with the atmosphere reduced the speed from 19300 km/h to 1600 km/h in 4.0 min.
stage b: a parachute then opened to slow it down to 321 km/h in 94 s.
stage c: retro rockets then fired to reduce its speed to zero over a distance of 75 m.
assume that each stage followed immediately after the preceding one and that the acceleration during each stage was constant.

1- find the rocket's acceleration (in m/s2) during stage a

2- find the rocket's acceleration (in m/s2) during stage b

3-find the rocket's acceleration (in m/s2) during stage c

Acceleration is given by:

where

v is the final velocity

u is the initial velocity

t is the time interval

Let's apply the formula to the different parts of the problem:

A)

Let's convert the quantities into SI units first:

t = 4.0 min = 240 s

So the acceleration is

B)

As before, let's convert the quantities into SI units first:

t = 94 s

So the acceleration is

C)

For this part we have to use a different formula:

where we have

v = 0 is the final velocity

u = 89.2 m/s is the initial velocity

a is the acceleration

d = 75 m is the distance covered

Solving for a, we find

answer: its c lololo

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas