Displacement is a vector quantity, which means that we need to specify a magnitude and direction. So, unlike distance, displacement cares what direction the object is going when it moves between two points. So, in one dimension, displacement can be positive, negative, or zero
Answer:
C. mass
Explanation:
Properties such as conductivity and density are usually normalized, so usually do not depend on sample size. While the amount of heat required to melt a sample will depend on its size, the actual melting point temperature does not.
Of the items on your list, "mass" is the one that depends on sample size. In fact, we usually describe the size of a sample in terms of its mass.
frequency's unit is Hz which mean cycles per second
given frequency * wavelength = speed of wave
speed of light = 3x10^8 m/s
wavelength = 680nm = 680x10^-9 m
frequency * 680x10^-9 m = 3x10^8 m/s
frequency = 3x10^8 / 680x10^-9
= 4.41x10^14 Hz
= 441x10^12 Hz
= 441 THz
which is the frequency for red light
