A wave's velocity is 20 m/sec with a wavelength of 40 m. What is
it's frequency?

What type of nuclear decay causes the atomic number of an element to increase by 1?

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?