Answer:
H1 = 63.3 kJ
Explanation:
Given:
ΔL = 2.256 kJ/g
Cp = 4190J/kg⋅K
Steam at 100°C in contact with your skin, condenses to water at 100°C. Therefore,
Q = M × ΔL
= (25.0 g)(2.256 kJ/g)
= 56.4 kJ
This condensed water at 100°C is then cooled to 34°C. The heat involved with this temperature change is;
Q = m × Cp × ΔT
= (25 × 1kg/1000g × 4190 × (100°C - 34°C)
= 6913.5 J
= 6.914 kJ
The total heat H1,
= (56.4 kJ) + (6.9135 kJ)
= 63.3 kJ.
The three types of heat transfer are conduction convection and radiation. <u>Explanation:</u>
- Heat transfer happens only when there is said to be a temperature difference. (i.e) heat transfer occurs with a higher temperature region to a lower temperature region.
- Heat is transferred usually via some medium in the case of convection and conduction whereas in the radiation no medium is required ( i.e it take place in a vacuum ).
- Conduction is a type of heat transfer that is mainly a character for the conducting and semiconducting solid material.
- Convection is the heat transfer method that usually takes place in the liquids and gases.
- Radiation is the heat transfer process in which heat is transferred via infrared or electromagnetic waves.
Answer:
a) The total force is 4659.8 N
b) The gauge pressure is 50764 Pa
Explanation:
Given:
Pressure inside = 0
Patm = pressure outside = 1.013x10⁵Pa
Pressure difference = ΔP = 1.013x10⁵ - 0 = 1.013x10⁵Pa
a) The area is equal:
The force is:
b) The gauge pressure at the bottom is equal:
Where:
ρ = density = 1000 kg/m³
h = 17 ft = 5.18 m
Replacing: