A boat travels at 30 mph for a huge, solid cliff that is about 3,000 meters away. When the horn on the boat makes a toot, you ca n hear the initial sound directly from the horn and also an echo from the cliff wall some time later. How does the frequency of the echo compare with the frequency of the horn before the ship moved?
1 answer:
Answer:The frequency of the echo is slightly decreased
Explanation:
Given
speed of boat
cliff is
when boat is still , suppose t is the time taken by the echo to reach observer on the boat
But as soon as boat starts moving the distance between cliff and boat decreasing and time for echo to reach observer also decreases
and we know
therefore frequency of the echo slightly decreased.
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<u>Answer</u>
4.8212×10⁻¹¹ N
<u>Explanation</u>
The gravitational force F, between 2 masses m₁ and m₂ is given by:
F = (Gm₁m₂)/d²
Where G = 6.673 x 10⁻¹¹ N m²/kg² and d is the distance between the 2 masses.
F = (Gm₁m₂)/d²
= (6.673 x 10⁻¹¹ × 0.425 × 0.425)/0.500²
= 1.2053×10⁻¹¹/0.25
= 4.8212×10⁻¹¹ N
Answer:
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