At any point, the electric field points in the direction of the force
on a positive point-charge located there. So the lines point away
from a positive charge, and toward a negative one.
The temperature of a fluid rises when energy is given to it. This phenomenon can be described by the equation:
Q = MCp ΔT
where,
Q is the quantity of added energy.
M is the fluid's mass.
The fluid's heat capacity is denoted by Cp.
T stands for temperature change.
<h3>What happens to a fluid's kinetic energy as the temperature rises?</h3>
The mean kinetic energy of the particles in a liquid rises with temperature. The molecules' higher average kinetic energies allow them to more easily overcome the attraction forces that keep them bound together.
<h3>Which temperature rise makes liquids more fluid?</h3>
The most significant determining factor for fluidity is pouring temperature. Therefore, the fluidity increases as the pouring temperature increases.
<h3>How does a liquid react when the temperature rises?</h3>
Particles in a solid, liquid, or gas move more quickly as its temperature rises. The particles slow down as the temperature drops. When a liquid is sufficiently cooled, it turns into a solid.
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The velocity of the mass at time, t = 1 s, is determined as 20 m/s.
<h3>
Magnitude of the force experienced by the body</h3>
The magnitude of the force experienced by the body is calculated as follows;
|F| = √(8² + 6²)
|F| = 10 N
<h3>Acceleration of the mass</h3>
From Newton's second law of motion;
F = ma
where;
- m is mass
- a is acceleration
a = F/m
a = 10 /0.5
a = 20 m/s²
<h3>Velocity of the mass after 1 second</h3>
v = at
v = 20 x 1
v = 20 m/s
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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 
.
