A Is false because physical properties can relate to any chemical substance.
B Is false because physical properties are apparent wether a chemical change has occurred or not.
C Is correct because physical properties can be observed without making a chemical change to the substance, chemical properties cause physical properties but a chemical change is not needed to observe a physical property.
D Physical properties describe compounds in all phases of matter.
The question above is simply asking us to convert the value from calories into kilojoules. Therefore, we need some factor to multiply to be able to convert it to such units. For calories to kJ, the factor would be 4.184.
satellites communicate by using radio waves to send signals to the antennas on the Earth. the antennas then capture those signals and process the information coming from those signals.
