You are designing a new home for a cold climate. You want one room in the house to be warmed by the Sun's energy. Which material would be best to use
for absorbing energy from electromagnetic waves that have entered the
room?
A. A mirror
B. Clear glass
C. A shiny metal
D. Dark fabric

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?