Answer:
water sample have more water content
Explanation:
given data
soil 1 is saturated with water
unit weight of water = 1 g/cm³
soil 2 is saturated with alcohol
unit weight of alcohol = 0.8 g/cm³
solution
we get here water content that is express as
water content =
....................1
here soil is full saturated so
is 100% in both case
so put here value for water
water content = 100 % × 1
water content = 1 g
and
now we get for alcohol that is
water content = 100 % × 0.8
water content = 0.8 g
so here water sample have more water content
a) For the thermal efficiency we have

With the previously values we know that
and
(convert the min to sec)
Replacing the values

b) We use the formula of carnot efficiency

**Note that apply the formula of carnot cycle we need to consider that there is no exchange of heat, there is no friction and the reservior are completely insulated
Answer:
a) s = 42 m
b) V = 26 m/s
c) a = 11 m/s²
Explanation:
The velocity(V) = 2 - 4t + 5t^3/2 where t is in seconds and V is in m/s
a) To get the position, we have to integrate the velocity with respect to time.
We get the position(s) from the equation:


Integrating both sides,


Integrating, we get

But at t=0, s(0) = 2 m
Therefore,

c = 2
Therefore
When t = 4,


s = 42 m
At t= 4s, the position s = 42m
b) The velocity equation is given by:

At t = 4,

V = 2 - 16 + 40 = 26 m/s
The velocity(V)at t = 4 s is 26 m/s
c) The acceleration(a) is given by:


Differentiating with respect to t,


At t = 4 s,


a = 11 m/s²