Why do moon phases repeat about every 28 days

New England Patriots quarterback Tom Brady throws a football straight toward a receiver with an initial speed of 16.0 m/s, at an angle of 25.0° above the horizontal. At that instant, the receiver is 16.5 m from the quarterback.

Can a cyclic group have more than one generator

Consider two waves X and Y traveling in the same medium. The two carry the same amount of energy per unit time, but X has one-seventh the amplitude of Y. What is the ratio of their wavelengths? (λY/λX=?)

Why is magnitude of average velocity not equal to speed?

The portion of the visible electromagnetic spectrum (sunlight) having the shortest wavelength is:

If a forklift raises a 76-kg load a distance of 2.5 m, about how much work has it done?

When a fork is placed in a hot piece of lasagna, thermal energy is transferred up the fork by ...

Levi observed properties of four different waves and recorded observations about each one in his chart.

A rocket is shot straight up from the earth, with a net acceleration (acceleration by the rocket engine minus gravitational pullback) of during the initial stage of flight until the engine cut out at sec.

Which moon has a thick atmosphere made mostly of nitrogen?