Ashell is fired with 500km/h on a target half kilometer away. in what time in which shell will hit the target.

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?