# Comparing Celsius and Fahrenheit temperature scales | Pre-Algebra | Khan Academy

In this video Sal Khan compares Celsius and Farenheit temperature scales. The two thermometers are side by side and he indicates the boiling and freezing points. (02:50) The instructor uses computer software for demonstration.

# Evaluating expressions with variables word problems

In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!

# Evaluating expressions with variables word problems

In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!

# Evaluating expressions with variables word problems

In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!

# Evaluating expressions with variables word problems

In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!

# Example: evaluate a formula using substitution

In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!

# Manipulating formulas

Sal takes the formula for converting fromï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½Fahrenheitï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½temperature toï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½Celsius, and solves it for F so it serves to convert fromï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½Celsius toï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½Fahrenheit.

# Calculating the Radian Measure of an Angle

## By AlRichards314

This video shows us how the radian measure of an angle is calculated. Remember that this does not change the angle, it is just another way for us to write its measure (somewhat in the same way that we can write a temperature in Celsius or Fahrenheit). This video shows us the measure of 1 radian, which will always be the same: 180 degrees/ pi, or about 57 degrees.

# Colligative Properties - Boiling Point Elevation, Freezing Point Depression & Osmotic Pressure

## By The Organic Chemistry Tutor

This chemistry video tutorial provides a basic introduction into colligative properties such as boiling point elevation, freezing point depression, osmotic pressure, and vapor pressure. It explains how to calculate the boiling point and freezing point of a solution as well as how to calculate the molar mass of a solute using osmotic pressure and freezing point depression.

# Ariel Waldman: Life Under The Ice!

## By Lumos Learning

Check out Ariel's website: https://lifeundertheice.org/​ Mister Brown gets a video message from his friend, Ariel Waldman, a real scientist who went all the way to Antarctica to study life that lives under the ice!

# Faces and Places Across the United States: Sandra talks to August in Florida

## By American English

In this episode of Faces and Places host Sandra talks to August about living in four different states in the United States.

# Optical Activity - Specific Rotation & Enantiomeric Excess - Stereochemistry Youtube

## By The Organic Chemistry Tutor

This organic chemistry video tutorial explains how to calculate the specific rotation of an enantiomer given the observed rotation, the pathlength, and the concentration of the solution. It discusses how to determine if a molecule will show optical activity based on its chirality. It also provides the formulas needed to calculate the optical purity and enantiomeric excess. Those formulas can be used to calculate the relative percentages of the R and S isomers.

# How To Solve Doppler Effect Physics Problems

## By The Organic Chemistry Tutor

This physics video tutorial provides a basic introduction into the doppler effect of moving sound waves. it explains how to solve doppler effect problems in physics. Any time the source moves toward the observer or if the observer moves toward the source, the detected frequency will increase - that is - the observed frequency will be greater than the frequency emitted by the source. The source can be an ambulance truck or a police siren. If the source moves away from the observer or if the observer moves away from the source, the detected frequency will decrease. This video contains plenty of examples and practice problems of calculated the frequency detected by the observer.

# pH of Weak Acids and Bases - Percent Ionization - Ka & Kb

## By The Organic Chemistry Tutor

This chemistry video explains how to calculate the pH of a weak acid and a weak base. It explains how to calculate the percent ionization of a weak acid using the acid dissociation constant Ka.

# Earth Science for Kids - Solar System, Weather, Fossils, Volcanoes & More - Rock 'N Learn

## By Lumos Learning

Earth Science for Kids is the fun way to learn important facts about earth science and prepare for tests. Take a fascinating journey to the Super Science Station to learn about the Solar System, weather and the water cycle, types of rocks, properties of minerals, volcanoes and plate tectonics, and renewable energy. For gifted preschool learners to kids in junior high, all ages will enjoy this learning adventure. Clear explanations and humor make this video perfect for the classroom and home. Created along with teachers to meet state testing standards.