I think its b but not sure
C I’m not that sure though
Wavelength and frequency are important because every frequency has its place on the electromagnetic spectrum. Also electromagnetic spectrum has many different wavelengths and frequencies on it . We only see a small fraction of what is created. The wavelength and frequency differs from wave to wave. You go from the lower frequency microwaves all the way up to the high frequency of gamma rays. It is important to determine the "type" of light because different wavelengths have different pulsation speed. The gamma rays pulse much faster then the light we see, and the light we see also goes faster than microwaves.
Answer:
The answer is below
Explanation:
A cross-country skier moves 28 meters westward, then 62 meters eastward, and finally 54 meters westward.
For this motion, what is the distance moved?
What is the magnitude and direction of the displacement?
Answer:
a) The distance moved is the summation of all the distance, therefore:
Distance = Distance first moved westward + Distance moved eastward + Final distance moved westward = 28 m + 62 m + 54 m = 144 m
Distance = 144 m
b) Displacement is a vector quantity (has magnitude and direction). The displacement is the shortest distance from the starting to final point.
Total distance westward = 28 m + 54 m = 82 m
Total distance eastward = 62 m
Displacement = Total distance westward - Total distance eastward = 82 m - 62 m = 20 m
Displacement = 20 m westward
The displacement has a magnitude of 20 m and the direction is westward
When an object gets heated by a temperature ΔT energy needed, E = mcΔT
Here mass of glass = 55 g =
Change in temperature ΔT = 16^0C[/tex] = 16 K
Specific heat of glass = 0.84 J/gK = 840 J/kgK
Substituting we will get
E = *840*16 = 739.2 J
So a heat of 739.2 J is required to raise the temperature of a 55 g glass ball by 16°C