Absolute pressure at the bottom of the lake = pressure due to water height + Air pressure = Density of water*gravitational acceleration* height + 101.3 kPa
Therefore,
Absolute pressure = 1/1000(1*10^3*9.81*29.1) + 101.3 = 285.471+101.3 = 386.771 kPa
The resistance of a conductive wire is given by:

where

is the material resistivity

is the wire length

is the cross-sectional area of the wire
The length of the wire is quadrupled, so if we call L the original length and L' the new length, we can write

Similarly, the radius of the wire is doubled (r'=2r), so the new area is

And if we substitute into the equation, we find that the new resistance of the wire is

Therefore, R=R': this means that the resistance of the wire did not change.
The correct option is B.
All objects emit electromagnetic radiation and the amount of radiation emitted at each wavelength depend on the temperature of the object. This observation is described by Wien's law, which states that the black body radiation curve for different temperatures peaks at a wavelength that is inversely proportional to the temperature.
Answer:
Velocity is the displacement (change In position of an an object it is similar to distance ) divided by the time taken. SI unit m/s (metre per second)