Radio waves and visible light are both forms of electromagnetic radiation, so they both travel at the speed of light in vacuum. What makes them different are their wavelengths (or synonymously their frequencies).The wavelengths of visible light span from about 390-700 nm, and the frequency from 430 to 790 THz.The wavelengths of radio waves go from about 1 mm to 100 km, and frequencies between 3 kHz and 300 GHz.The different sized wavelengths also give rise to slightly different properties. For example, since radio waves have a longer wavelength and lower frequencies, they are less energetic than visible light. Recall:Elight=hν=hcλ
where Elight is the energy of the light, h is Planck's constant, c is the speed of light, νis the frequency of light, and λ is the wavelength
Answer:
a) The flow rate of the air is 0.0104 kg/s
b) The fraction of the temperature is 23.91%
Explanation:
a) Given:
N = Number of PCBs = 8
Q = heat dissipated = 10 W
W = power supplied = -25 W
ΔT = rise temperature = 10°C
The total amount of heat dissipated is equal to:
The expression of conservation of energy is:
Replacing:
b) The amount of heat is equal:
The fraction of the temperature is:
%
The cT is short for continental tropical. It originates over the Mexican Plateau region and desert SW. It is a warm air mass over a continent. It is hot and very dry because of where it formed. Hope these facts about continental tropical air masses helped you!
letter a because 4N to the left +3N to the right = 4N left minus 3N left as you change the direction of 3N then you also change the plus into minus. the direction will always favour to which of the direction is bigger
