A building is 512 m high. What must be the minimum water pressure in a pipe at ground level in order to get water out of a tap in a restaurant on the top floor? Density of water is 1000 kg/m^3, assume the pressure on the top floor is 1 atmosphere (Patm=1.01 x 10^5 Pa). a. 5 x 10^6 Pa
b. 2 x 10^6 Pa
c. 1 x 10^6 Pa
d. 5 x 10^5 Pa
e. 1 x 10^5 Pa

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Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.