The reason grooves are rifled into the bore of a gun is so that a: bullet will be made to spin and hence have a true and accurate course on leaving the barrel. bullet moving through will have unique striations. manufacturer can put its unique mark on its product. bullet will be reduced in size before it exits the gun ballistics examiner will have an easier time identifying evidence

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm

Which of the following list the divisions of the geologic time scale in order from longest to shortest

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?