A pulse displays all wave characteristics except: frequency
amplitude
velocity
energy

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?