Ask questions, doubts, problems and we will help you..
Ask questions which are clear, concise and easy to understand.
Ask Question
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Guna .M 5 years ago (10324100)
- 0 answers
Posted by Saurav Kumar. 5 years ago (10297417)
- 3 answers
Akshar Mehta 5 years ago (9127429)
Gaurav Seth 5 years ago (2898529)
Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
• The two laws of reflection are:
(i) the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane.
(ii) the angle of reflection (<i>r</i>) is always equal to the angle of incidence (<i>i</i>)
∠<i>r</i> = ∠<i>i</i>
Yogita Ingle 5 years ago (2577571)
- The law of reflection defines that upon reflection from a smooth surface, the angle of the reflected ray is equal to the angle of the incident ray, with respect to the normal to the surface that is to a line perpendicular to the surface at the point of contact.
- The reflected ray is always in the plane defined by the incident ray and the normal to the surface at the point of contact of the incident ray.
Posted by Neshok Ls 5 years ago (10299150)
- 1 answers
Yogita Ingle 5 years ago (2577571)
| Balanced forces | Unbalanced forces |
| If a set of forces acting on a body produce no acceleration in it, then forces are said to be balanced. | If a set of forces acting on a body produces some non zero acceleration, forces are said to be unbalanced. |
| e.g. When we try to push a heavy box and it does not move, the force applied by us is balanced by the friction force acting on the box by the ground. | e.g. When we drag a box on the floor, there is an unbalanced force acting on the box. |
Posted by Neha Barthwal 1 year, 11 months ago (9649091)
- 1 answers
Yogita Ingle 5 years ago (2577571)
Let v be the velocity of the girl on the cart as the cart starts moving.
The total momenta of the girl and cart before the interaction = (50 x 5 m s-1) + (4 x 0 m s-1)
= 250 kg m s-1
The total momenta after the interaction = (50 + 4) kg x v m s-1
= 54 v kg m s-1
According to the law of conservation of momentum,
Total momentum before the interaction = Total momentum after the interaction
→ 54 v = 250
v = 250/54 = 4.62 m/s
Posted by Kaur Reet 5 years ago (10272533)
- 3 answers
Anmol Mishra 4 years, 11 months ago (10333201)
Posted by Deep Chandak 5 years ago (10323937)
- 5 answers
Jaskirat Singh 4 years, 11 months ago (10247259)
Gaurav Seth 5 years ago (2898529)
Albert Einstein was really a scientific genius. He felt at home in Mathematics but he showed keen interest in physics. After graduating from the university in Zurich he started working vigorously. With his university education he was working on relativity.
Yogita Ingle 5 years ago (2577571)
Albert Einstein was born on 14th March in 1879, in the German city of Ulm. Till the age of two and half years, he could not speak and when he started speaking, he spoke every word twice. His playmates considered him to be boring and his mother thought that he was crazy because of the abnormally large size of his head.
Posted by Jeet Patel 5 years ago (10316621)
- 3 answers
Posted by Aradhya Sharma 5 years ago (10176054)
- 2 answers
Posted by Ziya Sharma 5 years ago (10320492)
- 2 answers
Viraj Gaikwad 5 years ago (10324185)
Yogita Ingle 5 years ago (2577571)
Any changes which can be reversed or are a temporary conversion are known as reversible changes. The reactions which are reversible are called reversible reactions. In this reaction, one substance is modified into another form but a new compound is not formed. Processes such as melting, boiling, evaporation, freezing, condensation, dissolution are reversible changes. Few examples are melting of wax, freezing of ice, boiling water which evaporates as steam and condenses back to water.
Posted by Aman Raj 5 years ago (9264356)
- 2 answers
Gaurav Seth 5 years ago (2898529)
a ns w e r
Colonialism is the establishment of a colony in one territory by a political power from another territory, and the subsequent maintenance, expansion, and exploitation of that colony.
Posted by Rudraksh Gautam 5 years ago (10323787)
- 1 answers
Posted by Aabid Ansari 5 years ago (10323749)
- 2 answers
Yogita Ingle 5 years ago (2577571)
Parimal Ghose knew that Bepin Babu’s wife was dead, and his only brother had died in the same year in a Ranchi lunatic asylum. He also knew that Bepin Babu had no children and he was a lover of books.
Bepin Choudhury, popularly known as Bepin Babu, went to Kalicharan’s every Monday after work to stock up on his books to last a week. He lived alone, and did not have many close friends and was not fond of idle talk. One such Monday, when he was at Kalicharan’s looking for his books, a man named Parimal Ghose addressed him as if he knew Bepin Babu.
Posted by Ishu Raj 5 years ago (9745909)
- 1 answers
Posted by Royal Thakur ? 5 years ago (9579994)
- 4 answers
Posted by Jyoti Insan 5 years ago (10227610)
- 1 answers
Gaurav Seth 5 years ago (2898529)
Let the speed of the second train be x km hr. Then, the speed of the first train is (x + 5) km/hr.
Let O be the position of the railway station from which the two trains leave.
Distance travelled by the first train in 2 hours
= OA = Speed x Time
= 2 (x + 5) km
Distance travelled by the second train in 2 hours
= OB = Speed x Time
= 2x km
By using pythagoras theorem, we have,
AB2 = OA2 + OB2
⇒ 502 = {2(x + 5)}2+ {2x}2
⇒ 2500 = 4(x + 5)2 + 4x2
⇒ 8x2 + 40x – 2400 = 0
⇒ x2 + 5x – 300 = 0
⇒ x2 + 20x – 15x – 300 = 0
⇒ x (x + 20) – 15 (x + 20) = 0
⇒ (x + 20) (x – 15) = 0
⇒ x = –20 or x = 15
⇒ x = 15
[∵ cannot be negative]
Hence, the speed of the second train is 15 km/hr and the speed of the first train is 20 km/hr.
Posted by Jashan Preet Kaur 5 years ago (9453772)
- 3 answers
Akanksha Tiwari 5 years ago (10324173)
Yogita Ingle 5 years ago (2577571)
Many course available in india':-1)Diploma in yoga 2)Diploma in physical education 3)Diploma in yoga teacher training 4)Post Graduate Diploma in yoga 5)Post Graduate Diploma in physical education .
Gaurav Seth 5 years ago (2898529)
Various physical education cources available in India:
(1)Bachelor's Degree
¤ BA (Physical Education)
¤ BA (Yoga)
¤ B Ed (Physical Education)
.........
(2) Diploma Courses
¤ Diploma in yoga teacher training
¤ Diploma in physical education
¤ Diploma in yoga
.........
(3) Certificate Couses
¤ Certificate course in Aerobics
¤ Certificate course in Yoga
science
¤ Certificate course in Yoga
........
(4) Master's Degree
¤ M A (Yoga)
¤ M P Ed
¤ Ph D (Physical Education)
Posted by Prabhat Kumar 4 years, 11 months ago (10312783)
- 2 answers
Posted by Priya Verma 5 years ago (10323541)
- 2 answers
Krishna Shubhm 4 years, 11 months ago (10274351)
Gaurav Seth 5 years ago (2898529)
| 1. | Compiler scans the whole program in one go. | Translates program one statement at a time. |
| 2. | As it scans the code in one go, the errors (if any) are shown at the end together. | Considering it scans code one line at a time, errors are shown line by line. |
| 3. | Main advantage of compilers is it’s execution time. | Due to interpreters being slow in executing the object code, it is preferred less. |
| 4. | It converts the the instructions into systematic code. | It doesn’t convert the instructions instead it directly works on source language. |
Posted by ꧁#̶ ̶M̶R̶ ̶D̶I̶L̶I̶ ̶P̶꧂ . 5 years ago (10178811)
- 5 answers
?? Singh 5 years ago (9945064)
Sumesh ☺️☺️☺️ 5 years ago (8504833)
Posted by Ramanpreet Kaur 5 years ago (9260480)
- 1 answers
Gaurav Seth 5 years ago (2898529)
i-low, ii-spontaneous, iii-Kerosene
The minimum temperature at which a substance catches fire is called ignition temperature. The ignition temperature of sodium is very low. Hence, it catches fire easily at room temperature. It reacts vigorously with oxygen at room temperature. To prevent its spontaneous combustion, it is stored under kerosene.
Posted by Prabhat Kumar 5 years ago (10312783)
- 1 answers
Gaurav Seth 5 years ago (2898529)
| 40 | चत्वारिंशत् |
| 41 | एकचत्वारिंशत् |
| 42 | द्विचत्वारिंशत् , द्वाचत्वारिंशत् |
| 43 | त्रिचत्वारिंशत् , त्रयश्चत्वारिंशत् |
| 44 | चतुश्चत्वारिंशत् |
| 45 | पञ्चचत्वारिंशत् |
| 46 | षट्चत्वारिंशत् |
| 47 | सप्तचत्वारिंशत् |
| 48 | अष्टचत्वारिंशत् , अष्टाचत्वारिंशत् |
| 49 | एकोनपञ्चाशत् |
| 50 | पञ्चाशत् |
| 51 | एकपञ्चाशत् |
| 52 | द्विपञ्चाशत् |
| 53 | त्रिपञ्चाशत् |
| 54 | चतुःपञ्चाशत् |
| 55 | पञ्चपञ्चाशत् |
| 56 | षट्पञ्चाशत् |
| 57 | सप्तपञ्चाशत् |
| 58 | अष्टपञ्चाशत् |
| 59 | एकोनषष्ठिः |
| 60 | षष्ठिः |
| 61 | एकषष्ठिः |
| 62 | द्विषष्ठिः |
| 63 | त्रिषष्ठिः |
| 64 | चतुःषष्ठिः |
| 65 | पञ्चषष्ठिः |
| 66 | षट्षष्ठिः |
| 67 | सप्तषष्ठिः |
| 68 | अष्टषष्ठिः |
| 69 | एकोनसप्ततिः |
| 70 | सप्ततिः |
| 71 | एकसप्ततिः |
| 72 | द्विसप्ततिः |
| 73 | त्रिसप्ततिः |
| 74 | चतुःसप्ततिः |
| 75 | पञ्चसप्ततिः |
| 76 | षट्सप्ततिः |
| 77 | सप्तसप्ततिः |
| 78 | अष्टसप्ततिः |
| 79 | एकोनाशीतिः |
| 80 | अशीतिः |
| 81 | एकाशीतिः |
| 82 | द्वशीतिः |
| 83 | त्र्यशीतिः |
| 84 | चतुरशीतिः |
| 85 | पञ्चाशीतिः |
| 86 | षडशीतिः |
| 87 | सप्ताशीतिः |
| 88 | अष्टाशीतिः |
| 89 | एकोननवतिः |
| 90 | नवतिः |
| 91 | एकनवतिः |
| 92 | द्विनवतिः |
| 93 | त्रिनवतिः |
| 94 | चतुर्नवतिः |
| 95 | पञ्चनवतिः |
| 96 | षण्णवतिः |
| 97 | सप्तनवतिः |
| 98 | अष्टनवतिः |
| 99 | एकोनशतम् |
| 100 | शतम् |
Posted by No Jams 5 years ago (9622876)
- 0 answers
Posted by Bhagyashree Priyadarshini 5 years ago (10318412)
- 2 answers
Gaurav Seth 5 years ago (2898529)
Answer : Folding and faulting are caused due to the compressional and tensional forces deep inside the Earth. They result in the occurrence of Earthquakes.
Extra explanation:
The difference between folding and faulting is that folding is the pressure of converging plates causing the crust to fold and buckle, resulting in the creation of mountains and hills and faulting is where cracks in the earth's rock are created because of different movement of tectonic plates.
Posted by Ansh Salaria 5 years ago (10307303)
- 1 answers
Gaurav Seth 5 years ago (2898529)
The Mass per cent formula is expressed as solving for the molar mass also for the mass of each element in 1 mole of the compound. You can determine the mass percentage of each element with these masses.
Posted by Raunak 1234 5 years ago (10301847)
- 0 answers
Posted by Shivkanya Sase 5 years ago (9617510)
- 4 answers
Sumesh ☺️☺️☺️ 5 years ago (8504833)
Posted by Bhagyashree Priyadarshini 5 years ago (10318412)
- 2 answers
Gaurav Seth 5 years ago (2898529)
Relief in the subject of Geography means the terrain of the Earth surface or the geographical features . Relief can also be defined as the difference in the elevation level on the earth surface that is the difference in the highest and lowest elevation. The structures like plateau, plains, mountains, volcanoes, Hills, valleys, cliffs etc are called as the relief features of the Earth surfaces.
Posted by Thejessri Sathasivam 5 years ago (10323275)
- 3 answers
Gaurav Seth 5 years ago (2898529)
Haemoglobin is the respiratory pigment that transports oxygen to the body cells for cellular respiration. Therefore, deficiency of haemoglobin in blood can affect the oxygen supplying capacity of blood. This can lead to deficiency of oxygen in the body cells. It can also lead to a disease called anaemia. The average haemoglobin content of blood, irrespective of ***, is 14.5 gm per 100 mL.
</article>Naitik Shakya 5 years ago (9675805)
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
