Give the symbol for each, and the units:
1.What is the mean kintetic energy of all particles in a sample of matter?
2.What is the amount of thermal energy that flows between two or more bodies of different temperatures?
1. The symbol for the mean kinetic energy of all particles in a sample of matter is "KE" or "E_kinetic". The unit of kinetic energy is the Joules (J).
To calculate the mean kinetic energy, you need to know the mass (m) and velocity (v) of each individual particle in the sample. The formula for kinetic energy is:
KE = 1/2 * m * v^2
To find the mean kinetic energy, you would sum up the kinetic energies of all particles in the sample and then divide it by the total number of particles.
2. The symbol for the amount of thermal energy that flows between two or more bodies of different temperatures is "Q" or "ΔQ". The unit of thermal energy is also the Joules (J).
The amount of thermal energy (heat) that flows between two or more bodies can be calculated using the formula:
Q = mcΔT
Where:
- Q represents the thermal energy (in Joules)
- m is the mass of the substance in the process (in kilograms)
- c is the specific heat capacity of the substance (in J/kg°C)
- ΔT is the change in temperature between the initial and final states (in °C or K)
In this equation, the mass and specific heat capacity are specific to the substance involved in the heat transfer process. By plugging in the values for mass, specific heat capacity, and the temperature difference, you can calculate the amount of thermal energy that flows between the bodies.