Physical properties are

a, those properties which require a chemical reaction to be observed

b, those properties which include combustibility , flammability , and reactivity

c, those properties that cannot be changed

d, all of the answer are correct

e, those properties which can be observed without changing the identity of the substance

Define the terms moral development and moral reasoning.

Tara goes on a camel safari in africa. she travels 5 km north, then 3 km east and then 1 km north again. what distance did she cover? what was her displacement?

Acertain sound is recorded by a microphone. the same microphone then detects a second sound, which is identical to the first one except that the amplitude of the pressure fluctuations is larger. in addition to the larger amplitude, what distinguishes the second sound from the first one? it is perceived as higher in pitch. it is perceived as louder. it has a higher frequency. it has a longer wavelength.