The density of mercury is 13.5 times greater than the density of water. if you were to build a barometer that used water instead
1 answer:
Answer:
Height of water column 10.26 m
Explanation:
Given data;
Mercury density is 13.5 times higher than water density.
Mercury barometer 76 cm or 29.92 inches
we know that the mercury column is balanced by the pressure of air in mercury barometer
we know also standard atmospheric is equivalent to 29.92 inches of mercury
Height of water column must be
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Answer:
Magnetic field at point having a distance of 2 cm from wire is 6.99 x 10⁻⁶ T
Explanation:
Magnetic field due to finite straight wire at a point perpendicular to the wire is given by the relation :
......(1)
Here I is current in the wire, L is the length of the wire, R is the distance of the point from the wire and μ₀ is vacuum permeability constant.
In this problem,
Current, I = 0.7 A
Length of wire, L = 0.62 m
Distance of point from wire, R = 2 cm = 2 x 10⁻² m = 0.02 m
Vacuum permeability, μ₀ = 4π x 10⁻⁷ H/m
Substitute these values in equation (1).
B = 6.99 x 10⁻⁶ T