1. State some sources of heat energy and their uses. .
2. Define: -
a) Vaporisation Point. b) Combustion.
3. Draw a neat labeled diagram of Automatic fire alarm.
4. Convert -60°C into: -
a) Kelvin.
b) °F.
5. Write any two everyday applications of radiant heat.
Answers
Answer:
(1ans)
>Gas Fired Water Heater. Here at Radiantec we often recommend the use of domestic water heaters instead of expensive boilers. ...
>Oil Fired Boilers or Water Heaters. Oil can be less expensive than gas in some locations at this time. ...
>Wood or Coal Heaters. ...
>Solar Collectors. ...
>Radiant Retrofit. ...
>Electric Heat. ...
>Geothermal.
(2ans)
(a) Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. The surrounding gas must not be saturated with the evaporating substance. When the molecules of the liquid collide, they transfer energy to each other based on how they collide with each other.
(b) Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
(3ans)
(4ans)
(a) Conversion formula: °C = K − 273.15 and kelvin = 273.15 + Celsius. Absolute zero temperature: 0 K = -273.15 °C (degrees Celsius). The K (kelvin) is a unit of temperature and one of the units of International System of Units (SI).
(b) (60°C × 9/5) + 32 = 140°F
(5ans)
The transmission of electromagnetic waves through the microwave oven. The heat emitted by a radiator. Solar ultraviolet radiation, precisely the process that determines the Earth's temperature. The light emitted by an incandescent lamp.
