A submarine sends a signal and receives an echo after 5 seconds. Calculate the speed of sound if distance of object from submari
2 answers:
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Answer:
The frequency of the photon is .
Explanation:
Given that,
Energy
We need to calculate the energy
Using relation of energy
Where, = energy spacing
Put the value of h into the formula
Hence, The frequency of the photon is .
Answer:
The net displacement of the car is 3 km West
Explanation:
Please see the attached drawing to understand the car's trajectory: First in the East direction for 4 km (indicated by the green arrow that starts at the origin (zero), and stops at position 4 on the right (East).
Then from that position, it moves back towards the West going over its initial path, it goes through the origin and continues for 3 more km completing a moving to the West a total of 7 km. This is indicated in the drawing with an orange trace that end in position 3 to the left (West) of zero.
So, its NET displacement considered from the point of departure (origin at zero) to the final point where the trip ended, is 3 km to the west.
