Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

C) that light travels in a straight line

Explanation:

Light travels in a straight line, that is why the light travels through the cards that are arranged in a straight line but also that is why light enters a room through the window and forms angles, you can see it at dawn when light enters a room throug a window it forms an angle, it forms shadows, because light travels in a straight line.

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

a polar bond is formed when electrons are shared unevenly between atoms