Burning coal is a chemical reaction, a chemical change; but the solid reactant is transformed in gaseous products (H2O and CO2) - this is a physical change.
The equation for the magnitude of acceleration in physics is a v / t, where a represents acceleration, v is the change in velocity, and t is the change in time.
The equation for the change in thermal energy in a system is Q mcT, where Q represents the change in thermal energy, m is the mass of the system, c is the specific heat capacity of the material, and T is the change in temperature.
The acceleration equation is a = Δv / Δt, where "a" represents acceleration, "Δv" is the change in velocity, and "Δt" is the change in time. This equation is used to calculate how the velocity of an object changes over a specific period of time.
Delta in the equation for thermal energy typically represents a change or difference, such as a change in temperature or heat energy. It signifies the final state of the system minus the initial state to calculate the thermal energy change.
The equation can be rewritten as F = ma, where F represents force, m represents mass, and a represents acceleration.
The standard form equation of a line is y=mx+b. M represents the slope; slope is the change in x over the change in y. B represents the y-intercept.
The equation for the magnitude of acceleration in physics is a v / t, where a represents acceleration, v is the change in velocity, and t is the change in time.
The burning of gasoline represents a chemical change because it involves a reaction with oxygen to produce heat, light, and new chemical compounds. On the other hand, the evaporation of gasoline represents a physical change as it involves the gasoline changing from a liquid to a gas without any change in its chemical composition.
The constant "t" in an equation represents time, and its significance lies in determining how the variables in the equation change over time.
Toasting bread represents a chemical change.
In the equation E=he, h represents Planck's constant, which is a fundamental physical constant that relates the energy of a photon to its frequency.
Tearing paper represents a physical and not a chemical change. Chemical bonds are not broken in this instance, but paper is physically separated (by force) from other paper.
y=mx +b is the equation for slope intercept form. y = the output of the equation m = the slope x = the input into the formula b = the y-intercept The slope represents the rate of change. This is because for every input, or x, you put into the equation, is changed by m. So the M portion of this equation would be the rate of change.
Spoiled food of any kind represents a CHEMICAL change.
Evaporation is not a chemical change and so there is no chemical equation.
Physical because it is still Oxygen. A chemical change results in a chemical equation and thus a new substance. No new substance = no chemical change. Liquefaction is a physical property.
i m pretty sure a colour change represents a Chemical change