A convex lens cannot produce heat. It can focus incident heat to a smaller area so that it is more intense.
manish
Heat engine are physical working machines, therefore they are fact
It takes approximately 4.184 Joules of heat to raise the temperature of 1 gram of water 1 degree C. 1 Joule is the energy of 1 Watt for 1 second (or 3,600,000 Joules equals 1 Kilowatt-hour). In more real world numbers: It takes 69.7 watts 1 minute to heat a liter of water 1 degree C; or 146.6 watts in 1 minute to heat a gallon of water 1 degree F. A watt is a watt, weather it comes from resistance, radiant or induction. The only variations will come from the efficientcy of the heat source's design and how it is being used.
This can be calculate quite simply using the following steps. First calculate the power loss (as heat energy) from the iron using the relationship: P= I2R, P is power in Watts, I is current in Amps, R is resistance in Ohms. In this case P = 102 x 10 = 1000 W Next convert 4 hours into the standard time unit, seconds. 4 hours = 60 seconds per minute * 60 minutes per hour * 4 hours = 14400s Finally calculate how much heat energy is produced during this time using the relationship: E = Pt, P is power in Watts, E is energy in Joules, t is time in seconds. In this case E = 1000 x 14400 = 14400000 J Or more appropriately 14.4 MJ (megajoules). Hope this helps, Tom
If you mean energy produced by nuclear reactors, then "heat" and "light" would be the answers (Just think of the sun)
laplac theory is laplac correction about the statement of newton about sound heat in which newton said that when we talk there is no heat produced and no change in environmental heat but to correct this laplac said that there is heat produced when we talk and there is a change in environmental heat or temperature.
The heat generation formula used to calculate the amount of heat produced in a system is Q mcT, where Q represents the amount of heat produced, m is the mass of the substance, c is the specific heat capacity of the substance, and T is the change in temperature.
Use Einstein's Theory of Special Relativity
Benjamin Thompson's experiment, where he showed that metal can be melted by friction produced by boring a cannon, disproved the caloric theory by demonstrating that heat could be produced by mechanical work rather than through the transfer of a mysterious fluid called caloric. This experiment challenged the prevailing understanding of heat as a fluid and supported the emerging kinetic theory of heat.
To calculate the heat produced by the heating element, multiply the power (1400 watts) by the time it is used. Power (W) = Voltage (V) x Current (A). So, the heat produced will be 1400 watts.
How does heat affect the properties of materials? What is the relationship between heat and temperature? How is heat transferred between objects? How can we calculate the amount of heat produced or absorbed during a reaction?
To calculate the efficiency of a heat engine, you can use the formula: Efficiency (Work output / Heat input) x 100. This formula compares the amount of useful work produced by the engine to the amount of heat energy it takes in. The efficiency is expressed as a percentage, with higher percentages indicating a more efficient engine.
The percentage of radiation produced compared to the amount of heat produced depends on the source of heat. For example, in a typical fire, about 70-90% of the heat produced is in the form of radiation. In contrast, for electric heating sources, the percentage of radiation produced is lower as most of the heat is convective.
A convex lens can concentrate sunlight to a small point, creating intense heat that can ignite materials. By focusing sunlight through a convex lens onto a combustible material, you can generate enough heat to start a fire. This process is called solar or lens fire starting.
Enthalpy is a particular amount of heat that is produced or released at a given pressure. There are specific equations that must be used to calculate enthalpy.
Solar heat is produced by stars. The people who live on Earth get their solar heat from the sun.
heat