In which one of the following situations is zero net work done? A) A ball rolls down an inclined plane. B) A physics student str
2 answers:
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Answer:
Explanation:
In order to answer this problem you have to know the depth of the column, we say R, this information is important because allows you to compute some harmonic of the tube. With this information you can compute the depth of the colum of air, by taking tino account that the new depth is R-L.
To find the fundamental mode you use:
n: mode of the sound
vs: sound speed
L: length of the column of air in the tube.
A) The fundamental mode id obtained for n=1:
B) For the 3rd harmonic you have:
C) For the 2nd harmonic:
Answer:
a) On Earth
490N
b) On the Moon
85N
c) On Mars
185N
d)in outer space traveling with constant velocity.
0
Explanation:
The weight is defined as:
(1)
Where m is the mass and g is the gravity
a) On Earth
Then, equation 1 can be used:
but 1N = Kg.m/s^{2}
Hence, the weight of the astronaut on Earth is
b) On the Moon
Hence, the weight of the astronaut on the Moon is
c) On Mars
Hence, the weight of the astronaut on Mars is
(d) in outer space traveling with constant velocity.
Tanking into consideration that the astronaut is traveling in outer space at a constant velocity, it can be concluded that the acceleration will be zero.
Remember that the acceleration is defined as:
Since the acceleration is the variation of the velocity in a unit of time.
Therefore, from equation 1 is gotten.
Remember that g is the acceleration that a body experience as a consequence of the gravitational field.