If a horse travels 20 meters in 5 seconds what is the horses speed

distance = speed * time

speed = distance / time

speed = 20 meters / 5 seconds

speed = 4 meters / second

hope this helped!

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.