2. How much time would it take a car to travel 100 miles, if it was traveling at a constant speed of 45
mph? GIVEN
EQUATION
TE DIS

2.22 hours (or 2 and 2/9)

Explanation:

Divide the distance you want to travel by the constant speed.

t = time

d = distance

s = speed

t = d/s

t = 100 miles/45mph

t = 2.22 h

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

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.