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Answer:
The temperature is 749.8 K
Explanation:
Final temperature (T2) = (distance apart/thermal coefficient of expansion×length) + initial temperature
distance apart = 1.5 mm = 1.5/1000 = 0.0015 m
thermal coefficient of expansion for copper = 16.6×10^-6/K
Length of copper = 20 cm = 20/100 = 0.2 m
Initial temperature = 25 °C = 25 + 273 = 298 K
T2 = (0.0015/16.6×10^-6×0.2) + 298 = 451.8 + 298 = 749.8 K
We have that the expression for the magnitude of the horizontal force F is
From the question we are told
find an expression for the magnitude of the horizontal force f in the figure for which m1 does not slip either up or down along the wedge. all surfaces are friction-less.
Generally the equation for Normal force is mathematically given as
Where
a signifies acceleration
Therefore
Equating above equations
i
Generally the equation for Force on wedge is mathematically given as
Therefore
The expression for the magnitude of the horizontal force F is
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Answer:
The speed of sound in this gas = 416 m/s
Explanation:
The wave produced in a column open at one end, closed at the other has the relation L = λ/4 with the length of the tube.
The standing wave pattern for the tube closed at one end has a node at the closed end & an antinode at the open end.
The distance between the node and antinode = wavelength/4 = λ/4
1.3 = λ/4
λ = 5.20 m
For any wave, v = fλ
v = velocity of the wave = ?
f = frequency of the wave = 80 Hz
λ = wavelength of the wave = 5.20 m
v = 5.2 × 80 = 416 m/s
Answer:
d.) Marbles 1 and 2 repel each other, but no interaction occurs with marble 3.
Explanation:
By rubbing 1 and 2 with silk, the two marbles get positively charged however marble 3 is neutral because it did not have any interaction with any charge. So the correct answer is d.