Students and Teachers Forum
Solution : (2x - 3)2 - (3x - 2 )2 = 4x2 - 12x + 9 - ( 9x2 - 12x + 4) = 4x2 - 12x + 9 - 9x2 + 12x - 4 = -5x2 +5 =-5(x2 - 1) = -5 (x+1) .....
चित्रः कर्म .....
Force is push or pull It can be defines as an external agent which tends to change the state of body either from rest to motion or vice-versa. Its SI unit is Newton .....
Newborn Hippo stay under water or hold it's breath: 60 to 90 seconds An adult hippo can hold its breath underwater for up to 30 .....
Some fish (sharks and rays) don’t have any true bones—their skeletal elements are made of cartilage. The number of bones in .....
Solution : Let age of mother be x and of daughter be y. 1st condition : 1/6 x = y or, x = 6 y ......1 2nd condition : x - y = 35 ..... 2 From 1 and 2, 6y - y = 35 or, 5 y = 35 or, y = 7 and, x = 6 y = 6 * 7 = 42 years Thus, the age .....
In geometry, a ray can be defined as a part of a line that has a fixed starting point but no end point. It can extend infinitely in one .....
Solution : Let age of mother be x and of daughter be y. 1st condition : 1/6 x = y or, x = 6 y ......1 2nd condition : x - y = 35 ..... 2 From 1 and 2, 6y - y = 35 or, 5 y = 35 or, y = 7 and, x = 6 y = 6 * 7 = 42 years Thus, the age .....
The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, a word that refers to a lung disease contracted from the inhalation of very fine .....
A “dwarf planet” is a celestial body that
is in orbit around the Sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) .....A hydrometer or areometer is an instrument that measures the specific gravity (relative density) of liquids—the ratio of the density of the liquid to the density of .....
Solution, 1st expression = 15x2y2z4 = 3*5*xx yy zzzz 2nd expression= 20x4y2z3 = .....
Madal is a drum made of a hollowed tree trunk with skins stretched at both ends. It contains a black layer known as Khari in Nepal. It is played with both hands and is very popular in the hills of Nepal. It is played in various religious .....
Solution : 4a + 5/3 = a + 4/2 or, 4a - a = 4/2 - 5/3 or,3a = 2 - 5/3 or, 3a = 1/3 or, a = .....
Solution : 1 litre = 1000 cm3 1 cm3 = 1/1000 litre 1500 cm3 = 1/1000 * 1500 litres = 1.5 .....
The acceleration of the moving object starts to decreases due to decrease of final velocity. And, the negative acceleration is termed as .....
Velocity is a vector quantity. Take note that velocity is defined as the rate at which an object changes its position. So, it not only measures how fast the object is moving, but its starting point and end position are considered. The magnitude .....
Students and young people are the hope of every nation. Some of the roles students may play in protecting our nationlity are: encourage general public to participate in different events raise awareness in general public about the hardship our .....
Stratosphere ➡ The stratosphere is the second layer of the atmosphere. It lies above the troposphere and is separated from it by the tropopause. The stratosphere defines a layer in which temperature rises with increasing .....
Variation is defined as the difference among the individuals pr offsprings by which we can identify the different members of the same species. There are two types of variation : Hereditary variation and environmental .....
The trachea, commonly known as the windpipe, is a tube about 4 inches long and less than an inch in diameter in most people. The trachea begins just under the larynx (voice box) and runs down behind the breastbone .....
Intelligent mind of human can generate new ideas. A person with intelligent mind can get solution of any problems .....
We can become a skilled and able person by getting: i.good education ii. .....
Simple machine can be used to make our work easier, faster and in convinent .....
The factors that affectgravitational forces are : i. product of the masses of two bodies ii. square of distance between their .....
Solution : p and q are supplementary if p + q = .....
The factors that affect gravitational forces are : i. product of the masses of two bodies ii. square of distance between their .....
To keep our armpit clean, wash and clean underarms every .....
You do different activities in your daily life. If you do a certain activity regularly, we call it a habit. For example, some of you may have a habit of reading and some of you may have a habit of watching TV for a long time. Reading books .....
Capacity mean an individual's mental or physical .....
The main forms of energy are radiant, nuclear, electromagnetic, electrical, chemical, thermal, and .....
Possiblity of life on Earth is not due to many reason, 1. Atmosphere 2. Climate 3. Water 4. Light 5. Air 6. .....
Any external factor or change in the environment which brings about a response in an organism is called stimulus. Examples of stimulus are light, heat, sound, cold, touch, taste, .....
Plants,animals,birds,fish and human beings are the natural things. These things are the gifts of nature. .....
The Arithmetic Mean is the average of the numbers: a calculated "central" value of a set of numbers. To calculate it: • add up all the numbers, • then divide by how many numbers there are. Example: .....
Fruit drop down from tree because of presence of force of gravity of earth. Force of gravity tries to pull everything towards its .....
Car wheels slip in mud because the mudbeing smooth and slippery reduces the friction between the wheel and the surface of .....
A person slips over banana peels because the inner side of banana peel being smooth and slippery reduces the friction between the sole of our shoe and the surface of .....
Tennis ball is lighter (less mass) than a cricket ball. Tennis ball moving with same speed has less momentum (mass × velocity) than a cricket .....
In general, four numbers are said to be in proportion, if the ratio of the first two quantities is equal to the ratio of the last two. In general, the symbol for representing a proportion is “: .....
The relation between Buddhism and pagodas is explained in Buddhist literature. It says that pagodas were originally built for the purpose of preserving the remains of Sakyamuni, the founder of Buddhism. According to Buddhist scripture, when .....