Which sentences describe disavantages of burning fossil fuels instead of using hydrogen fuel cells
1 answer:
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Answer:
Answer:
71.6°
Explanation:
According to the diagram
ED = 6 feet
DA = EB = 3 feet
AC = 15 feet
AB = ED = 6 feet
BC = AC - AB = 15 - 6 = 9 feet
Let the angle is θ from the horizontal
By the triangle EBC
tanθ = BC / EB = 9 / 3
tanθ = 3
θ = 71.6°
Thus, the angle from the horizontal is 71.6°.
Explanation:
The frequency of an oscillation is equal to the reciprocal of the period:
where
f is the frequency
T is the period
In our problem, the period is T=8.01 s, therefore the corresponding frequency is
where
f is the frequency
T is the period
In our problem, the period is T=8.01 s, therefore the corresponding frequency is
Answer:
Explanation:
wavelength
d = 0.190 mm = 0.190 × 10⁻³ m
D = 1.91 m
By using the formula:
The first maximum will appear at an angle from the beam axis