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m₁ = 2.3 kg <span>
θ₁ = 70° </span><span>
θ₂ = 17° </span><span>
g = 9.8 m/s²
->The component of the gravitational force on m₁ that is parallel down the incline is: </span><span>
F₁ = m₁ × g × sin(θ₁) </span><span>
F₁ = (2.3
kg) × (9.8 m/s²) × sin(70°) = 21.18 N </span><span>
->The component of the gravitational force on m₂ that is parallel down the incline is: </span><span>
F₂ = m₂ × g × sin(θ₂) </span><span>
F₂ = m₂ × (9.8 m/s²) × sin(70°) = m₂ × (2.86 m/s²) </span><span>
Then the total mass of the system is:
m = m₁ + m₂ </span><span>
m = (2.3 kg) + m₂ </span><span>
If it is given that m₂ slides down the incline, then F₂ must be bigger than F₁, </span><span>
and so the net force on the system must be:
F = m₂×(2.86
m/s²) - (21.18 N) </span><span>
Using Newton's second law, we know that
F = m × a
So if we want the acceleration to be 0.64 m/s², then
m₂×(2.86
m/s²) - (21.18 N) = [(2.3 kg) + m₂] ×
(0.64 m/s²) </span><span>
m₂×(2.86
m/s²) - (21.18 N) = (1.47 N) + m₂×(0.64
m/s²) </span><span>
m₂×(2.22
m/s²) = (22.65 N) </span><span>
m₂<span> = 10.2
kg</span></span>
Explain why the speed of light is lower than
3.0 × 108 m/s as it goes through different media.
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the molecules are forced to vibrate. that vib causes re emission. speed of emiited waves less than in vac.
Answer:
106 single crossover events
Explanation:
Total number of offspring = 1250
<u>Determine the number of offspring that would be expected </u>
( Rf between the genes vg and Pr ) * ( Total number of progeny )
= 0.125 * 1250 ≈ 156 ( value for single and double crossovers )
next :
( value of the Rf of double crossovers ) * ( Total number of progeny )
= (0.322 * 0.125) = 0.04025 * 1250 = 50
Hence the number of offspring expected to obtain/represent a single crossover event between pr and vg
= 156 - 50 = 106