The speed of light is 3.0 x 10 to the power of 8 m/s. The Andromeda Galaxy is approximately 2.4 x 10 to the power if 19 km away from the Milky Way Galaxy. How long does it take light to travel from Andromeda to the Milky Way?

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

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?