Why does the position of the constellations orion appear to change throughout the year, and why can't orion be seen in the summer sky

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

The law of reflection states that the angle of reflection is equal to the angle of

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine