Explanation:
Given that,
Initial speed of a ranger, u = 36.2 mi/h
Distance dove by the ranger, d = 205 ft
Due to the application of brakes, the acceleration reached is 8.83 ft/s².
We need to find the maximum reaction time allowed if she is to avoid hitting the deer.
We know that,
1 mph = 1.46667 ft/s
36.2 mi/h = 53.09 ft/s
Let t is time.
Using second equation of kinematics to find it as follows :
The above is a quadratic equation. We need to solve it for t as follows :
Hence, 416.01 seconds is the maximum reaction time allowed if she is to avoid hitting the deer.
Angular width is 3 x 10^-3
Let D be the distance between source and screed d the distance between coherent source then for central diffraction maxima,
where λ is wavelength
Given:
λ = 450 nm = 450×10^−9m
d = 0.3x10^−3m, D = 1m
W = 2 x 450×10^−9/0.3x10^−3*1
To Find:
Angular width
Solution: The width of the central maxima is nothing but the difference between the positions of the first two minima. Hence we will use the expression for the position of minima and accordingly obtain the expression of the width of central maxima and secondary maxima
θ = W/D
θ = 2 x 450×10^−9/0.3x10^−3*1/1 = 3 x 10^-3
Hence, angular width is 3 x 10^-3
Learn more about Angular width here:
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Answer:
two places where thermal conduction takes place are gases and liquids, conduction is due to collisions of molecules during their random motion. Hence, the correct option is (C). Note: Though, the particle distances between gases are much more in comparison to solids and liquids, conduction slowly occurs in gases also
Explanation:
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