Make a chemical compound
Make a compound and get details about its molar mass, percentage composition by mass, and stoichiometry. The compound can be written as H2O and enter only one measurement below.
Dr. Osama M. Khaled
May 14, 2024 11:10 AM
Write mixed numbers as improper fractions
Understand in simple steps how to write a mixed number as an improper fraction
Dr. Osama M. Khaled
May 13, 2024 11:01 AM
The whole number and fractional parts
Identify the whole number and fractional parts of a mixed number
Dr. Osama M. Khaled
May 12, 2024 03:00 AM
Application Problems
Solve application problems by adding and subtracting fractions
Dr. Osama M. Khaled
May 07, 2024 08:37 AM
Identify the greater of two fractions
If two fractions have the same denominator, the fraction with the greater numerator is the greater fraction
Dr. Osama M. Khaled
May 05, 2024 08:16 PM
Find the LCD to add and subtract fractions
When we add or subtract fractions that have different denominators, the least common denominator is not always obvious
Dr. Osama M. Khaled
May 03, 2024 08:28 AM
Add and subtract fractions that have different denominators
Dr. Osama M. Khaled
Apr 28, 2024 07:27 AM
Fractions that have the same denominator
Add and subtract fractions that have the same denominator
Dr. Osama M. Khaled
Apr 26, 2024 01:43 AM
Application Problems
Problems that involve forming equal-sized groups can be solved by division
Dr. Osama M. Khaled
Apr 21, 2024 10:50 PM
Divide Fractions
To divide two fractions, multiply the first fraction by the reciprocal of the second fraction. Simplify the result, if possible.
Dr. Osama M. Khaled
Apr 19, 2024 07:54 AM
Calculations
The law of gravity included a symbol for proportionality. In order to use this relationship for solving problems, we must remove the proportionality by placing a constant in the expression
Dr. Osama M. Khaled
Apr 01, 2024 12:43 PM
Weightlessness
Heavy and light objects fall at the same rate !!
Dr. Osama M. Khaled
Mar 31, 2024 07:48 PM
Earth Satellites
Newton argued that if a cannon could be placed on a hill high enough to be outside the earth's atmosphere, and if the cannon could be made powerful enough, a cannonball could be placed in orbit around the earth.
Dr. Osama M. Khaled
Mar 30, 2024 07:48 PM
Kepler's Third Law
Kepler's third law states the relationship between a planet's average distance from the sun and the time required for the planet to complete one orbit
Dr. Osama M. Khaled
Mar 29, 2024 07:55 PM
Kepler's Laws
About 50 years before Newton formulated the law of gravity, Johanne Kepler (1571-1630) had found some rules that could be used to calculate the orbits of the planets
Dr. Osama M. Khaled
Mar 27, 2024 08:47 PM
The Moon and Gravity
The moon is 240,000 miles from earth-center, or 60 times as far as we are from center
Dr. Osama M. Khaled
Mar 27, 2024 07:56 AM
The Law of Gravity
Learn how gravity keeps the universe in balance
Dr. Osama M. Khaled
Mar 20, 2024 08:52 PM
Find the reciprocal of a fraction
Division with fractions involves working with reciprocals
Dr. Osama M. Khaled
Mar 17, 2024 01:23 AM
Solve application problems by multiplying fractions
The key word of often appears in application problems involving fractions. When a fraction is followed by the word of, it indicates that we are to find a part of some quantity using multiplication
Dr. Osama M. Khaled
Mar 14, 2024 07:37 PM
Evaluate exponential expressions that have fractional bases
If the base of an exponential expression is a fraction, the exponent tells us how many times to write that fraction as a factor
Dr. Osama M. Khaled
Mar 12, 2024 04:54 AM
Simplify answers when multiplying fractions
After multiplying two fractions, we need to simplify the result, if possible
Dr. Osama M. Khaled
Mar 06, 2024 08:40 AM
Use properties of parallel lines cut by a transversal to find unknown angle measures
Lines that are cut by a transversal may or may not be parallel
Dr. Osama M. Khaled
Jan 28, 2024 07:52 AM
Find powers of products
To raise a product to a power, raise each factor of the product to that power
Dr. Osama M. Khaled
Jan 18, 2024 03:55 PM
Raise exponential expressions to a power
To raise an exponential expression to a power, keep the base and multiply the exponents
Dr. Osama M. Khaled
Jan 11, 2024 04:58 AM
Single- and Double-Displacement Reactions
Recognize chemical reactions as single-replacement reactions and double-replacement reactions
Dr. Osama M. Khaled
Dec 28, 2023 06:10 AM
Expressing Units
Learn the units that go with various quantities, express units using their abbreviations, and make new units by combining numerical prefixes with units.
Dr. Osama M. Khaled
Dec 26, 2023 04:33 AM
Multiply exponential expressions
Multiply exponential expressions that have like bases
Dr. Osama M. Khaled
Dec 17, 2023 04:00 AM
Identify bases and exponents
An exponent indicates repeated multiplication as a shortcut method of how many times the base is used as a factor.
Dr. Osama M. Khaled
Dec 16, 2023 08:13 AM
Exercise 1: Vocabulary
Dr. Osama M. Khaled
Dec 11, 2023 03:44 AM
Application problems with unknowns
Solve application problems to find one unknown
Dr. Osama M. Khaled
Dec 02, 2023 08:40 AM
