Speed = (distance covered) / (time to cover the distance)..
From the ground to the highest point,
the rocket's AVERAGE speed is
(86 m) / (3.7 sec) = 23.2 m/s (rounded) .
Work formula:
W = F * d
F 1 = 40 N, d 1 = 6 m;
F 2 = 30 N; d 2 = 6 m.
W ( Cindy ) = 40 * 6 = 240 Nm
W ( Andy ) = 30 * 6 = 180 Nm
The difference of their amounts if work:
240 Nm - 180 Nm = 60 nm
hope it helps!
Answer:
The initial temperature of the hot water is
(assuming that no heat was lost to the surroundings.)
Explanation:
Let
denote the mass of the hot water.
The question states that the mass of the water at
is three times the mass of the hot water. If the mass of the hot water is
, the mass of the cold water would be
.
Let
denote the specific heat capacity of water. Let
denote the mass of some water. The energy required to change the temperature of that much water by
(without state change) would be:
.
The temperature change for the cold water was:
.
Energy required to raise the temperature of water with mass
from
to
:
.
On the other hand, if the initial temperature of the hot water is
(where
,) the temperature change would be:
.
Calculate the energy change involved:
.
If no energy was lost to the surroundings,
should be equal to
. That is:
.
Simplify and solve for
:
.
.
Therefore, the initial temperature of the hot water would be
.
We will make a graph to better understand the displacement of the individual. From the trigonometric properties we will find the required distances.



Displacement ,


The angle would be


Therefore the displacement was of 1101.608m to a angle of 1.838° from East to North.