## Science Laws

## If the selling price of 16 cows is equal to the cost price of 20 cows, then find?

math**If the selling price of 16 items is the same as the cost price of 20 items, then there is a loss or gain.**

**Q. The Cost price of 25 toys is equal to the selling price of 20 toys. find gain or loss percent.**

## How to calculate CGPA in Engineering VTU - vtu CGPA calculation

exams**Cumulative Grade Points Average**. CGPA is commonly used in CBSE board but now, it is also use in many engineering college to measure your semester marks. here in this particular post we will learn

**how to calculate cgpa in engineering vtu.**

## How to Calculate cgpa in engineering vtu

### What is VTU CGPA?

**VTU CGPA = ∑(Ci x Si) / ∑ Ci.**

**Where, 'si' is less than the SGPA and 'ci' is less than total credit in a particular semester.**

**In other words, VTU CGPA is defined as, It is equal to the sum of your aggregate percentage and 0.75.**

## What is Unit and Measurement in Physics - Easy language

Physics__Unit and Measurement Introduction:- __

**Physics**:- The study of nature and
natural things.

**It is the made of greek word " Fusis" means natural things and nature.**- It means that physics is the study of nature and its laws.
- Physics is the foundation of engineering and technology.
- Physics is based in experiment when experiments are done then it
measure with the help of physical quantity.
- Quantity means it represents the number.

**Physical
quantity:-** It is
represent of the physical laws in the term id quantity.

- It is of two types
- Scalar quantity and vector quantity.
- Scalar quantity means it has only magnitude not direction.
- vector quantity means it has both magnitude and as well as
direction.

## What is Unit?

__It ____is of two types__

- Fundamental unit
- Derived unit

1. **Fundamental unit:- **It is not depend another unit, three fundamental
unit are mass, length and Time.

2. **Derived unit:- **It is depend in fundamental unit.

**system
of unit are four types**

1. **Mks system:-** In
this system Length, Mass and Time are expressed in meter, Kilogram, and Second.

2. **Fps system:-** In
this system Length, Mass and Time is expressed in Foot, Pound, second.

3. **CGs system:-** In
this system Length, Mass and Time is expressed in Centimeter, Gram, second.

4. **S.I system;-** (
international System of Unit ) In S.I system having seven fundamental unit.

__Some examples of physical quantities with their si
units and cgs units__

Here is a collection of 5 fundamental and derived physical quantities which commonly used in physics
with their si units and CGS units. Also describe the derived quantity with
derivation.

We have already discussed
about the definition of physical quantity in the above definition. But lets
define the physical quantity in another words.

**Physical quantity are
those quantities which represents the quantities of any material with the help
of some symbols attached with numerical values.** For example a container
contains 6 kilograms of wheat. So we can write 6 kg. Here kg is the physical
quantity attached with numerical value of 6.

As we have already seen
above that, **Physical quantities are two types first is fundamental quantity
and second is derived quantity**. These are the following 5 physical
quantities (both fundamental and derived) with their si units and CGS units.
Before we start discussing following 5 physical quantities. Please note that
some quantities are derived from fundamental quantity.

- Mass
- length
- Time
- Acceleration
- Velocity

## What is measurement?

## How Rest and motion are related to each other - Relation with example

Physics

__Motion,__## Rest and motion are relative terms

- Suppose you are sitting in a train which is moving then we are at rest with respect to the other passenger sitting in that compartment but in motion with respect to the objects on the ground.
- Our house is at rest with respect to the other house on the earth but it is in motion with respect to an observer on the moon.

### Types of motion

**One dimension motion:-**

- The
- Moving of bus in a straight line.
- Falling of an apple from tree.
- If only co - ordinate is used from three co - ordinate x, y and z then the motion is one dimension motion.

**Two dimension motion;-**

- Motion in a plane is called two dimension motion.
- If only two co - ordinate is used from three co - ordinate x, y and z then it is called two dimension.
- The motion of object in horizontal and vertical circle.
- The earth revolving around the sun.
- S carom coin in motion.

**Three dimension motion;-**

- Motion in space is called three dimension motion.
- If all co - ordinate is used then it is called three dimension motion.

**Position:-**

- If particles on the origin then its position will be zero.
- If particles move along the positive direction of x - axis then its position positive.
- If particles moves along the negative direction of x - axis then position negative.