Answer:
The final equilibrium T_{f} = 25.7[°C]
Explanation:
In order to solve this problem we must have a clear concept of heat transfer. Heat transfer is defined as the transmission of heat from one body that is at a higher temperature to another at a lower temperature.
That is to say for this case the heat is transferred from the iron to the water, the temperature of the water will increase, while the temperature of the iron will decrease. At the end of the process a thermal balance is found, i.e. the temperature of iron and water will be equal.
The temperature of thermal equilibrium will be T_f.
The heat absorbed by water will be equal to the heat rejected by Iron.
Heat transfer can be found by means of the following equation.
where:
Qiron = Iron heat transfer [kJ]
m = iron mass = 200 [g] = 0.2 [kg]
T_i = Initial temperature of the iron = 300 [°C]
T_f = final temperature [°C]
Cp_iron = 437 [J/kg*°C]
Cp_water = 4200 [J/kg*°C]
<h3><u>Answer</u>;</h3>
Decrease
<h3><u>Explanation</u>;</h3>
- Chemical reaction may be either endothermic or exothermic based on whether they use heat energy or release it to the surroundings.
- An endothermic reaction occurs when the temperature of an isolated system decreases while the surroundings of a non-isolated system gains heat.
- In endothermic reactions the temperature of the surroundings decreases.
India's monsoon area i beleive
Answer:
A
Explanation:
because you cannot seperate the matter duhhh hahha
Answer:
The firefighter who holds the hose in the backward direction will experience greater force.
Explanation:
Lets take
mass flow rate = m
Inlet velocity = v₁
Exit velocity = v₂
When water leaves in the same direction ,then change in the linear momentum = m (v₂ - v₁)
And we know that change in the linear momentum is known as force.
F₁ =m (v₂ - v₁) ----------1
When water leaves in the opposite direction(U turn) ,then change in the linear momentum = m (v₂ +v₁)
F₂= m (v₂ +v₁) --------2
F₂ >F₁
There fore when water leaves in the U turn pipe will feel more force.
The firefighter who holds the hose in the backward direction will experience greater force.