What are the equipments in playing the Softball​

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?