Answer:
The metal Harvey should use for reflective coatings in telescope mirror is;
C. Aluminum
Explanation:
In a telescope, the mirror of the telescope is usually made of a temperature-resistant and strong glass, while the reflective coating of the mirrors is made usually from aluminum. A protective coating often composed of silicon dioxide is placed n the top of the reflective coating
Aluminum is used in a telescope, rather than the silver, which is the most reflective material, because silver requires special conditions to be able to work, and silver tarnishes when exposed to air containing sulfur, and silver is susceptible to corrode.
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Answer:
Input power of the geothermal power will be 686000 J
Explanation:
We have given density of brine 
Rate at which brine is pumped 
So mass of the pumped per second
Mass = volume × density =
kg/sec
Acceleration due to gravity 
Depth h = 200 m
So work done 
Efficiency is given 
We have to fond the input power
So input power 
So input power of the geothermal power will be 686000 J
Answer
diameter of parking lot = 18 in
flowrate = 10 ft³/s
pressure drop = 100 ft
using general equation



taking f = 0.0185
at Z₁ = Z₂

ΔP = 0.266 psi
b) when flow is uphill z₂-z₁ = 2


c) When flow is downhill z₂-z₁ = -2

