Table of Contents
What did James Joule discover?
James Prescott Joule experimented with engines, electricity and heat throughout his life. Joule’s findings resulted in his development of the mechanical theory of heat and Joule’s law, which quantitatively describes the rate at which heat energy is produced from electric energy by the resistance in a circuit.
What is the name for substances that transmit heat effectively?
A conductor is a material that allows internal (thermal) energy to be transmitted through it easily. Metals, such as copper and aluminium are the best conductors of heat.
When a meteorite hits Earth heat is generated which of the following statements best describes this process?
phys 103 test 1(2)
| Question | Answer |
|---|---|
| When a meteorite hits Earth, heat is generated. Which of the following statements best describes this process? | Gravitational potential energy is converted into heat |
| Which of the following organisms is at the first trophic level? | plants |
How did James Prescott Joule Discover heat?
In 1843 he published his value for the amount of work required to produce a unit of heat, called the mechanical equivalent of heat. In 1852 Joule and William Thomson (later Lord Kelvin) discovered that when a gas is allowed to expand without performing external work, the temperature of the gas falls.
How does James Joule work relate to energy?
Joule studied the nature of heat, and discovered its relationship to mechanical work (see energy). This led to the law of conservation of energy, which in turn led to the development of the first law of thermodynamics. The SI derived unit of energy, the joule, is named after him.
How does heat transfer by conduction work?
Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules. These vibrating molecules collide with their neighboring molecules, making them also vibrate faster. As these molecules collide, thermal energy is transferred via conduction to the rest of the pan.
How is energy transferred by heating?
Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them.
How does heat and temperature different from each other and do they work together?
The core difference is that heat deals with thermal energy, whereas temperature is more concerned with molecular kinetic energy. Heat is the transfer of thermal energy, whereas temperature is a property the object exhibits.
What is the mutual relation between heat and temperature?
Heat Is A Total Energy Of Molecular Motion In A Substance. Heat energy depends on the speed of the particles, the number of particles. Temperature Is Measure Of The Average Energy Of Molecular Motion In A Substance. Temperature does not depend on the size or type of object.