Sirius has an apparent magnitude of -1.5. canopus has an apparent magnitude of -0.7. which of the following statements is true?

sirius is brighter than canopus.
sirius is hotter than canopus.
the brightness ratio is 1.5 : 0.7.
the absolute magnitude of sirius is 15.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value