Which describes the combination of two primary colors of light to produce a secondary color of light?
a. Yellow light and blue light combine to produce green light.
b. Magenta light and cyan light combine to produce blue light.
c. Red light and green light combine to produce yellow light.
d. Green light and yellow light combine to produce white light.
Answer:
b. Magenta light and cyan light combine to produce blue light.
Explanation:
Primary colour is any of three colours which, when added to or subtracted from others in different amounts, can generate all other colours.
• Red, blue and green are additive primary colours..
• Magenta, yellow and cyan are subtractive primary colours.
Answer:
The x component of this vector is (-1î) unit
Explanation:
Vector position of point 1 = x₁ = 5 (cos (-π/3)î + sin (-π/3)j) = (2.5î - 4.33j)
Vector position of point 2 = x₂ =3(cos 60°î + sin 60°j) = (1.5î + 2.598j)
Vector joining the two point, x₁₂ = x₂ - x₁ = (1.5î + 2.598j) - (2.5î - 4.33j) = - 1.0 î + 6.928j
The x component of this vector is -1î unit.
Answer:
The lowest possible frequency of sound for which this is possible is 1307.69 Hz
Explanation:
From the question, Abby is standing 5.00m in front of one of the speakers, perpendicular to the line joining the speakers.
First, we will determine his distance from the second speaker using the Pythagorean theorem
l₂ = √(2.00²+5.00²)
l₂ = √4+25
l₂ = √29
l₂ = 5.39 m
Hence, the path difference is
ΔL = l₂ - l₁
ΔL = 5.39 m - 5.00 m
ΔL = 0.39 m
From the formula for destructive interference
ΔL = (n+1/2)λ
where n is any integer and λ is the wavelength
n = 1 in this case, the lowest possible frequency corresponds to the largest wavelength, which corresponds to the smallest value of n.
Then,
0.39 = (1+ 1/2)λ
0.39 = (3/2)λ
0.39 = 1.5λ
∴ λ = 0.39/1.5
λ = 0.26 m
From
v = fλ
f = v/λ
f = 340 / 0.26
f = 1307.69 Hz
Hence, the lowest possible frequency of sound for which this is possible is 1307.69 Hz.
If the sound source is approaching you, the frequency you hear is higher than the real frequency of by the sound. How much higher depends on how fast the source is approaching. If the source's speed is constant, then the frequency you hear is constant ... higher, but not increasing.
I am sorry but all I know is that 10. is abruptly. I hope it helps anyways