Two waves travel through ocean, one with wavelength 3 m, one with 6 m. Which one has greater speed?

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?