In one type of solar energy system, sunlight heats the air within solar panels, which heats copper tubes filled with water. what type of energy is produced by this system?
a. geothermal energy
b. hydroelectric energy
c. electric energy
d. heat energy

Geothermal energy

Explanation:

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2