# Learn Everything You Need To Know About The Mirror Formula With An Online Physics Tutor

Working with physics concepts is not everyone’s cup of tea and especially when it comes to topics such as mirrors whether concave or convex, most students lack the understanding required to work with them. For instance, the mirror formula is quite difficult for most students and often they turn towards online physics tutors to get help with the topic. Read on to learn everything you need to know about the mirror formula and how it is derived.

## Mirror Formula – what is it?

The mirror formula is essentially the relationship between an object (its distance), the image distance and the focal length. For a concave mirror, the formula goes as follows:

f – focal length, u – object distance, v – image distance

1/f = 1/u + 1/v

While we are at it, it is important to learn the sign conventions of spherical mirrors before we proceed with the derivation part.

## Sign Conventions and how they are used for Spherical Mirrors

There are three basic assumptions or conventions that one needs to know and they are:

• Every distance is measured from the pole of the mirror.
• Any distance that is measured in the direction of the ray of incidence or the incident ray is considered positive and the rays that are in the other direction (Opposite) are considered with a negative sign.
• Any distance that is measured above the principal axis is deemed positive and below is negative.

The below diagrams represent the conventions mentioned above for both the concave and the convex mirror.

## Derivation of the Mirror Formula for a Concave Mirror

This topic often sends students into a dizzy and assignments related to them are considered way too difficult. Learning the derivation properly can in itself serve as the best possible physics assignment help for students seeking to score straight A’s in their assignments. Read on to learn to derive the Mirror Formula.

In the above figure, the object AB is at a distance ‘u’ from the pole of the mirror (marked by ‘P’ in the diagram). Its image is formed at A1B1, a distance of ‘v’ from the pole. In the above figures, angles A1CB1and ACB are vertically opposite and hence equal. Similarly, angles ABC and A1B1C are right angles and hence equal.

angle ACB = angle A1CB1

angle ABC = angle A1B1C = 90 degrees

Thus, the third angle B1A1C and BAC in the two triangles are equal too and thus these two triangles are similar.

As triangles A1B1C and ABC are similar, we can write the following:

AB/ A1B1 = BC/B1C

In the same way, triangles, F B1 A1 and FED are similar. Thus, we can also write the following:

ED/ A1B1 = EF/F B1

It is apparent from the figure that ED and AB are equal. Thus, the above two equations can be simplified as follows:

BC/B1C = EF/F B1

Assuming that D is very close to P and the distance between them is negligible, we can write the above equation as follows (assuming that EF = PF):

BC/B1C = PF/F B1

We now proceed to wrote BC, FB1 and B1C as follows:

BC = PC – PB

B1C = PB1 – PC

F B1 = PB1 – PF

Thus, the above equation can be rewritten as follows:

(PC-PB)/( PB1 – PC) = PF/( PB1 – PF)

PC = R, PB is u and PF is f. V here is represented by PB1

The above equation thus further can be written as follows and with the sign convention, all of them take a negative sign which gives us:

(-R –(-u))/(-v –(-R)) = -f/(-v –(-f))

This gives us the following:

(-R + u) / (-v + R) = -f/(-v+f)

(u-R)/(R-v) = f/(v-f)

Cross multiplying and simplifying on both sides gives us the following:

uv – uf – Rv + Rf = Rf – vf

This further becomes:

uv – uf – Rv -= -vf

Since R = 2f, this can be written as:

uv – uf –2vf = -vf

This further gives us : uv – uf = vf

When you divide the above equation by uvf, you get the mirror formula:

1/f – 1/v = 1/u or alternately, 1/f = 1/u + 1/v.

## Summary

Students usually look for physics homework help when it comes to understanding and working with concave and convex mirrors. Learning to derive the mirror formula will help students ace this topic and score high in physics tests.

## Summary

Students usually look for physics homework help when it comes to understanding and working with concave and convex mirrors. Learning to derive the mirror formula will help students ace this topic and score high in physics tests.

# 10 Study Tips That Helps Students Study Smarter

A smart student is the one who studies smarter rather than studying harder. With more and more advancement in education, this thing becomes more prominent. 1 or 2 hours a day can really be sufficient when going through high school. However, when college arrives, time seems to be short though and you need to manage your studies in a way so that you can complete things on time without getting stressed out.

Very few of them actually have a smooth sail in tackling their studies specifically science assignment help with minimal efforts. However, by following apt study tips also related to science homework help, you can develop effective reading habits that can help you be successful just like those few exceptional students. So, do not get discouraged, if in case you have encountered failures previously.

Let us see those 10 highly efficient study tips that will always keep you encouraged, no matter what grade you are studying.

Do not cram altogether

Try not to cram all things at one shot. Divide your study in sections and keep gaps between sessions. Successful students are those who take shorter breaks between sessions in order to refresh mind before moving on to the next session.

Plan out things serially

Decide on times of the day when you are going to study. Systematically arrange the order of your study schedule. Follow the time delicately and do things only as per planned. Also, allocate time to review what you did through the day.

Time management is must

Once you have decided specific times of the day to study, just do things accordingly. Do not disturb your study timetable. Be emotionally as well as mentally strong while following the schedule dedicatedly as unexpected events might imply breaks that will test your concentration constantly.

Keep specific goals in mind while you study

Just reading out things or cramming things do not help. You need to have a learning perspective while you study. Set specific objectives in mind with every session especially with online science tutors that will give boost not only to your understanding but also academics.

Do not mess around with your study sessions

It is very common among majority students to lose interest in studies because of lack of understanding in certain subjects. Even sometimes, other things take over more priorities than the studies. Successful students are those who won’t be bothered by any interruptions. They do not procrastinate, postpone, or neglect their study sessions. With lack of continuation in your sessions, you will soon be lost amidst your studies making it very difficult for you to bounce back.

Finish the most difficult subject first

It is highly advisable to finish with the most difficult portions first while dealing with subjects or sections within the same subject. Once done with the hard part first, you will find yourself in a more comfortable and relaxed position. Not only that but because you have covered tricky subjects or sections first, you will find it really easy to go for the easier ones. This will not only put you on fast track but also greatly improve the academic performance.

Have a practice of reviewing notes before assignments

Jot down notes in a proper manner while in class. Before starting off with a particular subject or assignment, have a thorough review of notes that you have taken in class, and know what to expect when dealing with the actual thing. This will help you brush up and have a mental warm-up when learning the subject. You can know in advance what to learn and prepare first. By the time you reach near halfway, you are already done with the critical things making you more relaxed.

Do not get distracted

You are living in a world that is full of distractions. It can range from your family, relatives, or friends to worldly pleasures like television, smart phones, vacations, or infinite other things. Stay away from all those and find yourself a quiet peaceful place in order to remain focused and not lose your concentration.

Be part of study groups

You might have heard of a very well known saying, “two heads are always better than one.” This goes very well when it comes to study groups. Studying with friends in a group always help you to understand concepts in a fun manner without struggling a lot. Moreover, you intend to do things quickly, teach others, and get taught by others. This way you can grasp things in an organized manner and remember lessons with ease.

Do not feel ashamed of asking people

You might face a lot of difficulties in getting a jinx of various portions or subjects. Do not feel awkward in asking your friends whatever you feel you are not able to comprehend certain concepts.

# Hooke’s Law – an overview

There are so many phenomena occurring around us day to day that bewilder us when we try to explain the reason behind them. The stretching of a spring is one such occurrence and elasticity has long fascinated many! When an object is stretched, the property that lets it regain its shape is called elasticity and this property varies from material to material. While a rubber band can stretch to a great extent, a plastic item can’t stretch as much and this is due to the elasticity of both the materials. The fundamental law that governs this fascinating phenomenon is the Hooke’s Law. Students often find it interesting and yet it is not as easy to understand as many consider it to be. Most students are turning to an online physics tutor when it comes to topics such as this where they require complete understanding to apply it. Read on to learn about Hooke’s law and its applications.

## Hooke’s Law – an overview

The force required to extend a spring or compress it to a certain distance say Y is directly proportional to the distance. Force (F) = -kY where k represents a constant that is attributable to the stiffness of the spring. This law is an approximation that is quite accurate for many solids and is applied extensively across many branches of science. Interestingly, the physicist after whom the law is named first stated the law in the form of an anagram and released its answer only later!

In its general form, the Law is compatible with Newton’s Laws of static equilibrium as well. However, when an object is stretched beyond its elasticity, there will be noticeable deviations from the Hooke’s Law. Thus, understanding this law requires extra effort and mere classroom sessions may not suffice. This is why students turn towards an online tutor or online physics homework help for assistance. Another interesting representation of Hooke’s Law is using Stress and Strain. While stress is the force on a material as a result of an external force, strain is the resultant deformation as a result of the stress the object experiences. The Young’s modulus represents the Hooke’s Law in terms of stress and strain. Assignments are quite popular in this area and seeking online physics assignment help is a good idea to get a clear understanding of the topic and mastering it.

## Applications of Hooke’s Law

There are umpteen practical applications to this important law and a few of the things that we see around built on this principle are:

• BB gun
• Rubber tipped dart gun
• Springs of the wheels of a vehicle
• Springs used in transportation, military equipment and so on.

There are many more such interesting applications to this law and these are just a few examples! In fact, students find it very interesting to try out the applications of this law and it is often a favorite project amongst students.

## Summary

Hooke’s law deals with an important and fundamental concept in physics – elasticity. With its wide spread applications in various fields, it is imperative that students master this tricky yet basic concept and they can do so with expert help from online tutoring platforms.

# How To Master The Concept Of Fundamental Forces?

Every subject has certain fundamental concepts and theories that have to be mastered before a student proceeds to learn advanced concepts. Force is one of the primary things in physics, we can experience it all around us and understanding what it is all about is important to excel in physics. For instance, take the case of how an object accelerates to the ground during free fall or how an object rolls down an inclined plane. These are day to day occurrences that we see around us and physics is the subject that has an explanation for all of this. Let us analyze the theory behind the fundamental forces in physics; read on to learn more.

## Fundamental Forces – an overview

There are many different kinds of forces that act on an object while in motion or even when it is resting. However, there are only a few of the fundamental forces and these are also the topics wherein students seek physics homework help online. The fundamental forces are:

• The Gravitational Force
• The Electromagnetic Force
• The Nuclear Force – Strong and Weak

### Gravitational Force

The force of gravity is something that most of us are familiar with and is explained with Newton’s law. It is simply the force that exists or acts between any objects that posses mass. The center of gravity, Newton’s law of universal gravitation and the theory of relativity are the most studied topics under this head. Most teachers explain this concept by dropping an object to the floor and explaining why the object spirals downwards and how gravitational pull works on the object.

### Electromagnetism

Whenever particles interact with other particles and both are electrically charged, this phenomenon is referred to as electromagnetism. The electromagnetic force is perhaps the most prevalent and obvious force and citing examples around us is pretty easy and serves to improve learning dramatically. Usually the best online physics tutors employ various experiments and practical demonstrations to teach this important topic to students. Many consider electric and magnetic forces to be distinctly different and only when students lean this concept do they understand as to how they are interlinked.

### Nuclear Force

The forces that act inside an atom are equally important and they are one of the fundamental forces there are. There are two kinds of nuclear forces: the strong and the weak nuclear force. The strong force is responsible for the binding of the protons and neutrons within the nucleus while the weak force is responsible for things such as beta decay and so on. These are studies extensively in atomic and nuclear physics. This is perhaps one of the toughest concepts for students when it comes to fundamental forces and thus most of them seek physics assignment help and homework help online for this topic.

## Summary

The fundamental forces in physics are responsible for most of the phenomena we see around us day to day. The four fundamental types of interactions described above are responsible for most of the interactions observed and they can be completed described by these fundamental forces. Learning this concept well is important if a student aspires to get into a physics based major or aspires to be a scientist.

# Learn Everything About Acceleration Due To Gravity With An Online Physics Tutor

Physics has its share of tough topics and acceleration due to gravity is one of them; it isn’t particularly hard and neither is it easy to understand it in the first go. Simply put, acceleration due to gravity is the rate at which the velocity of an object changes that experiences a free fall and is moving downwards towards the earth. Discounting the air resistance, it is found that every object that in a free fall experiences the same acceleration and this is attributed to gravity. The earth’s gravitational pull is responsible for the object’s acceleration and is measured at 9.8 m/s2.

Most students seek physics assignment help in this area as they find it difficult to grasp the underlying concepts and work on the assignments. Now that we have acceleration defined, let us understand the laws involved and take up some examples to understand this fundamental concept that finds universal application.

According to Newton’s Second Law (of Motion), whenever there is a net force acting on an object or a body, it is equivalent to the product of the mass and acceleration or simply put, F= m*a (Mass * Acceleration). The mass employed here is the resistance the object offers to the force exerted and it can also be defined as the net quantity of matter that an object contains. There is a lot of difference between mass and weight though; let’s take a look.

## Mass vs. Weight

Weight is directly dependent on the gravitational force while mass directly relates to the quantity of matter in a body or an object. Depending on the gravitational pull, the weight of an object will vary! For instance, the moon where there is a lower gravitational pull as compared to the Earth will show a different weight for the same object than earth and so on.

Acceleration due to gravity is represented as ‘g’ instead of the usual ‘a’ that represents acceleration and the equation that connects weight, mass and gravity is W = mg. W is the net force (we replace the F for force with W here) and m is the mass. There is yet another Newton’s Law regarding Gravitation and that is one area where students flounder when it comes to homework and require physics homework help.

The Law of Universal Gravitation is quite simple once students understand the hang of it – every object or body has a gravitational pull or force on every other object. For example, when there are two objects with masses m1 and m2, they exert a gravitational pull on one other and the net force F is proportional to the product of their masses and is inversely proportional to the square of the distance between them which gives us F (F1=F2) =G (m1*m2/d2) and G here is the Gravitational Constant.

Sometimes, students may need more than just classroom help and in such cases engaging the services of an online physics tutor would be a good option. Not only would they get individual attention, they will also have an expert at their service at all times to clarify their doubts and this will certainly help them ace their physics exams.

# Overview Of The Laws Of Thermodynamics

Study of motion or in other words Dynamics is investigating why things move and what is the behavior behind that. The prefix thermo indicates heat, so thermodynamics is the investigation of what urges warmth to move in the way that it does.

Laws of Thermodynamics let us know about the flow of heat. The laws of thermodynamics are somewhat odd however very important when it comes to physics homework help. They are four of them. Let us check out them individually.

### Zeroth Law

It states that “If system A is at thermal equilibrium with system B, and B is at thermal equilibrium with system C, then A is at thermal equilibrium with C.” This dives more into logic than physics. In other words, if A & B have the same temperature, and B and C have the same temperature, then A and C have the same temperature as well.

This explains it that heat transfer taking place from a hot object to a cold object when placed together, until they reach a state of equilibrium. Get yourself an online physics tutor to help you out with the subject.

### First Law Of Thermodynamics

Consider a secluded framework where energy and heat neither leave nor enter the framework. Such a framework is doing no work, yet we take up with it a certain amount of internal energy, U, which is identified with the kinetic energy of the atoms in the framework, and in this manner to the framework’s temperature. This internal energy is referred similar to potential energy due to the property of a framework that is doing no work, however can possibly do work.

The first law lets us know that the potential energy of a framework builds if warmth is added to the framework or if work is done on the framework and reduces if the framework emits warm or does work. We can express this law as a mathematical statement where U connotes internal energy, Q implies heat, and W means work. The First Law is simply one more method for expressing the law of conservation of energy. Both work and heat are types of energy forms, so any warmth or work that goes into or out of a framework must influence the potential energy of that framework.

Second Law Of Thermodynamics

The second law is most well known for its entropy and formulation. The word entropy was instituted in the nineteenth century as a specialized term for discussing issue.

Pouring a tablespoon of salt and after that a tablespoon of pepper into a jug. At to start with, there will be two different stacks: salt as well as pepper. When you shake up the blend, the grains of salt and pepper will combine. No measure of shaking will then help you isolate the blend of grains again into two separate varieties. The two different salt and pepper constitute a more organized framework than the blend of the two.

Next, assume you drop the container on the floor. The glass will break resulting in grains of salt and pepper dispersing all over the floor. You can hold up persistently, however you’ll see that, while the glass could smash and the grains could scramble, no activity as basic as dropping a container will recover the glass to intervene again or the salt and pepper to accumulate themselves up. Your arrangement of salt and pepper in the container is more organized than the arrangement of smashed glass and dispersed condiments.

### Third Law Of Thermodynamics

The third law of thermodynamics expresses that “the entropy of a framework at absolute zero is a well defined constant.” This is on account of a framework at zero temperature with an existence in ground state, so that its entropy is resolved just by the decline of the ground state. It is difficult to cool a substance to absolute zero.

To know more on Laws Of Thermodynamics chat with live physics tutor online and get your physics assignment help from expert online physics tutors.

# Physics Online Tutoring: Offers tips to excel in Physics

Feeling difficult to study Physics? Do you find it difficult to solve physics word problems due to lack of basics? At Tutor Pace, we have expert online tutors offering you physics online tutoring. Physics is a technical subject and hence it requires complete understanding of subject. If you are not well-versed with fundamentals of Physics like equations of motions, laws of Newton etc. then solving problems won’t be easy for you. Hence, our tutors adopt tips and tricks to enable students build a strong base in subject.

Tips to understand most Physics concepts are:

• Revise difficult portions daily
• Write while reading for better understanding
• Clear your doubts right away from tutors
• Practice word problems daily

These are some of the tips that can help you well-versed with basic concepts. In one to one tutoring at Tutor Pace, our tutors offer help with homework, projects and exams to ensure you don’t lag behind others. For advance concepts, multimedia options like video conferencing are adopted by tutors to practically demonstrate the concept for better understanding.

Tutors are available 24×7 and hence you can find best tutors to assist you anytime. You can easily rely on your tutor for whatever you are doing in Physics. They guide you in best possible ways and make physics an interesting for you. After taking some sessions, you can realize difference between your later and present performance in class. Hurry and enroll yourself in our tutoring sessions today.

# How you can find a Physics tutor free on the World Wide Web?

Physics needs untiring efforts from students

The students who opt for Physics as a subject need to make untiring efforts to comprehend it in entirety. Physics is a subject that constantly comes up with new concepts and ideas every new day. Physics witnesses changing trends at regular intervals and it is necessary for students to be in sync with the latest happenings in the world of Physics. So many students go online in search of physics tutor free and their search results in a meaningful finding.

The exciting benefits of searching a Physics tutor free online: