Aball is launched from the ground with a horizontal speed of 30 m/s and a vertical speed of 30 m/s. what is the ball’s overall speed at the top of its trajectory?
a. 60 m/s
b. 0 m/s
c. 45 m/s
d. 30 m/s

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:

gas

explanation:

smoke is the matter of a gas

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.