What are the types of substances in Class 9?
A homogeneous material that contains particles of only one kind and has a definite set of properties is called a pure substance.
e.g. Iron, silver, oxygen, sulphur, Carbon dioxide etc., are pure substances because each of them has only one kind of particles.
Get the detailed notes of class9 chapter "Is matter around us pure" from the below link
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Chemistry as a subject is equipped with a lot of concepts and learning resources. While preparing for chemistry you will encounter lots of chemistry doubts which needed to be properly addressed. Chemistry is the subject of formulas, reactions, and energy. A different approach is required to have a good understanding of chemistry.
Know the detailed information about the topic, in the below link
Best Recommended Books For JEE Mains And Advanced | Physics Wallah
To crack JEE Mains and Advanced, you have to start with strong basics. You need to have a good understanding of Physics, Chemistry, and Mathematics which is essential. After this, you need to have strong fundamentals in the subjects like English, Computer Science, and Biology. Further, You need to do self-study for various competitive exams. Here we will suggest some good books for JEE Mains and Advanced as recommended by toppers
What are Compound Pendulum Formulas and Derivations?
The mass of the bob should be concentrated at one point in a basic #pendulum, in theory, however, this is impossible to do in reality. The majority of pendulums are #compound, having an #oscillating mass dispersed across a certain area. Get to know the complete derivation and its concept
List of NCERT Solutions for Class 7 All Subjects
The academic team of Physics Wallah consists of expert faculties from different CBSE schools and prepared detailed solutions to all questions given in the exercise of the NCERT textbook. The below-mentioned Links are solutions of the NCERT textbook as per the Subjects.
NCERT Solutions for Class 7 English
NCERT Solutions for Class 7 Science
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 7 Hindi
NCERT Solutions for Class 7 Social Science
Time travel is possible, according to mathematical models and scientific theories. However, the current status of science and technology does not allow us to build a device that can travel back in time. It is believed that in the distant future, time travel might be possible through advances in technology.
Physicists are researching to find answers to a few unknown questions. One of the questions that they are researching is related to the possibility of time travel. They want to find out whether time travel is possible. If somehow possible, a time machine can be created. This is the reason they are researching and working on it. The search for the time machine is on!
According to the #english Calender, there’re 12 months of the #year. The English calendar is also called the Gregorian #calender. During the year there are 365 days which means 12 months in total, each month contains 28, 29, 30, and 31 days. The exception of 29 days only happens in the case of #leap year which happens every 4th year. Here is the List of all the 12 months of the year
