Answer:
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Explanation:
Answer:The time interval is always positive quantity because time always moves forward. Time can not be reversed.
Explanation:
Velocity is defined as rate of change of position nothing but the displacement. Displacement can be positive or negative.
In case of time interval, time is always a positive quantity. it is impossible to reverse the time. To obtain any displacement we need to measure the time taken. which has to be positive. It always moves forward.
Answer:
The wavelength of the 320 Hz sound waves in the column of air is 1070 mm.
Explanation:
To solve the question, we note that the tube acts as a pipe with one end closed and that a stationary wave is formed in the tube from the top, to the bottom of the tube and back.
The simplest and the first wave form in the tube has length L = Lambda/4
That is, a node at the closed end and an antinode at the open end
The second stationary wave is given by
l + 535 mm= 3/4×lambda
However v = f×lambda
f = v/lambda = v/(4l)
Therefore
Lambda/4 + 535 mm = 3/4lambda
Or 535 mm = 3/4lambda -Lambda/4 = lambda/2
Therefore, lambda = 2×535 mm = 1070 mm
The wavelength = 1070 mm
Science can be used to look for other renewable resources than mining for coal