53 Science Tutorials

These Science tutorials are written by experienced educators, all of whom also offer private tutoring lessons. Get the Science help you need, whether through these tutorials or through private tutoring lessons.

Conservation of energy

When a system is isolated from the dissipative force, then the total energy of the system remains constant with time. One of the example of it is friction force. Its direction always oppose the motion of the system and at certain amount of time, the system energy will be reduced because of work done by…

Determine the mass of MgCl2 needed to prepare 1 L solution at 0,5 M Cl.

To prepare a certain amount (1 L) of solution (MgCl2) with a specific concentration (0,5 M or mol/Litre) of chloride, we will convert units from moles/L to mass, just like we would convert moles to mass.

What is Really Going on in Mitosis and Meiosis?

Mitosis and meiosis are processes repeatedly visited in biology, and both are important for understanding Mendelian inheritance patterns. These two processes are made up of four basic stages – prophase, metaphase, anaphase, and telophase. It may be simple enough to memorize these names, but what really matters is understanding what happens to the chromosomes in…

Decoding Pedigrees Made Easy!

At first, pedigree charts may appear both challenging and time-consuming to decipher. However, knowing a few simple rules about them makes interpreting them much easier! Pedigrees are records of mating over generations. They are often used to help identify the chances that a couple will pass a condition on to their children. They can also…

Conservative Forces and Conservation of Energy (Proof)

In this short section we will a) define conservative forces and b) prove that such forces conserve a quantity we call energy for constant mass systems. A conservative force \vec{F} is defined as:

(1)   \begin{equation*} \vec{F} = - \nabla U(\vec{r}) \end{equation*}

Where U is a function of the coordinates.Now we multiply both sides by $\vec{v} =…

Kinematic Relationships for AP Physics C

The relationship between position, velocity, and acceleration are an integral part of understanding how to approach kinematics problems for AP Physics C. These relationships can help you read and understand a graph, and they can help you solve for variables when given an equation for one of these quantities.

Projectile Motion Properties

Projectile motion is one of the keys concepts in physics and can be defined as 2-dimensional kinematic motion in which an object is launched at a certain angle giving the object motion in both the x and y directions. These problems are important to physics because they encapsulate concepts from kinematics and a key concept…

Protein Synthesis

How do we make the proteins we need to live? You may recall that DNA codes for proteins, that is, the sequence of the DNA nucleotides has the directions to make every protein we must have. In high school biology, you will be given a sequence of DNA bases and a codon chart with the…

Choosing the Appropriate Kinematics Equation

In the study of motion in physics, there are five kinematics equations that can be used to solve problems involving constant acceleration. They are: V = Vo + at d = 1/2*(Vo + V)*t d = Vo*t + 1/2*at^2 d = V*t – 1/2*at^2 V^2 = Vo^2 + 2ad Notice that each equation contains exactly…

Mechanics Made Easy: Dimensional Analysis

In physics, a situation or formula can be evaluated by its dimensions (i.e. Length[L], Time[T], Mass[M], etc). Dimensional analysis, as it is called, checks to see if the dimensions of a formula are balanced on each side. This method of evaluation can be useful because it ensures both sides of an equation have matching units.…

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