Science Notes

Physics part 1 10 MCQ Part 1  Physics 10 MCQ 1. ** What is the SI unit of force?* *    - A) Joule    - B) Pascal    - C) **Newton**    - D) Watt    - **Answer: C) Newton ** 2. ** Which of the following is **NOT correct** about **Vectors addition* *? - A) Vectors addition is associative - B) Vectors addition is commutative - C) Vectors of different natures can be added - D) None of the above - **Answer: C) Vectors of different natures can be added** 3. ** Which branch of Physics deals with the study of **Atomic Nuclei **? - A) Nuclear Physics - B) Bio Physics - C) Atomic Physics - D) None of the above ¹ - **Answer: A) Nuclear Physics* 4. * *If the momentum of an object is doubled, then what happens to its kinetic energy?**    - A) It remains the same    - B) It is halved    - C) It is doubled    - D) **It is quadrupled**    - **Answer:...

EVS part 1 Environmental Science (EVS) along with their answers: 1. **Environmental Science (EVS) along with their answers: 1. **Question**: What is the main focus of Environmental Science (EVS)?  - A) Studying the human body  - B) Investigating the solar system  - C) Understanding interactions between living organisms and their environment  - D) Analyzing historical events  **Answer**: C) Understanding interactions between living organisms and their environment¹. 2. **Question**: Which of the following topics is covered in the CBSE Class 4 EVS syllabus?  - A) Space exploration  - B) Our environment  - C) Ancient civilizations  - D) Quantum physics  **Answer**: B) Our environment². 3. **Question**: What is the impact of climate change on human health?  - A) Improved overall health  - B) No impact  - C) Increased risk of diseases  - D) Enhanced immunity  **Answer**: C) Increased risk of diseases¹. 4. **Question**:...

PHYSICS PART 3 PHYSICS PART 3  (ADRE) 1. A vehicle moving on a circular path experiences ________?    - [A] Centripetal force    - [B] Centrifugal force    - [C] Gravitational force    - [D] None of the above    - **Answer: [A] Centripetal force** ¹ 2. Which among the following is measured by an Odometer?    - [A] Pressure    - [B] Height    - [C] Distance    - [D] Velocity    - **Answer: [C] Distance** ¹ 3. The power of a lens is measured in:    - [A] Diopters    - [B] Aeon    - [C] Lumen    - [D] Candela    - **Answer: [A] Diopters** ¹ 4. Which among the following orbits is more prone to space debris or space junk in comparison to others?    - [A] Polar Sun Synchronous Orbit    - [B] Low Earth Orbit    - [C] Geosyn...

PHYSICS PART 4  Here are **16 multiple-choice physics questions** along with their answers: 31. **A vehicle moving on a circular path experiences ________?**  - [A] centripetal force  - [B] centrifugal force  - [C] gravitational force  - [D] None of the above  - **Answer: [A] centripetal force** ¹ 32. **Which among the following is measured by an Odometer?**  - [A] Pressure  - [B] Height  - [C] Distance  - [D] Velocity  - **Answer: [C] Distance** 33. **Which among the following orbits are more prone to the harms of space debris or space junk in comparison to others?**  - [A] Polar Sun Synchronous Orbit  - [B] Low Earth Orbit  - [C] Geosynchronous orbit  - [D] Geostationary Orbit  - **Answer: [B] Low Earth Orbit** ¹ 34. **Which among the following radio frequencies are used around the world in the air navigational system?**  - [A] Very Low Frequency (VLF)  - [B] Very High Frequency (VHF)  - [C]...

VITAMIN তলত ভিটামিন সম্পৰ্কীয় ২০টা MCQ আৰু তাৰ উত্তৰ দিয়া হৈছে: 1. **ভিটামিন A**ৰ ৰাসায়নিক নাম কি?    - a) থায়ামিন    - b) ৰিব'ফ্লেভিন    - c) নিয়াচিন    - d) রেটিনল    - **উত্তৰ:** d) রেটিনল 2. **ভিটামিন C** কোনটো খাদ্যত প্ৰচুৰ পৰিমাণে পোৱা যায়?    - a) নেমু    - b) গাজৰ    - c) আলু    - d) দুগ্ধ    - **উত্তৰ:** a) নেমু 3. কোনটো ভিটামিন হাড়ৰ স্বাস্থ্যৰ বাবে গুৰুত্বপূৰ্ণ?    - a) ভিটামিন A    - b) ভিটামিন B12    - c) ভিটামিন D    - d) ভিটামিন K    - **উত্তৰ:** c) ভিটামিন D 4. কোনটো ভিটামিন সূৰ্যৰ পোহৰত ত্বকে উৎপাদন কৰে?    - a) ভিটামিন A    - b) ভিটামিন B6    - c) ভিটামিন D    - d) ভিটামিন E    - **উত্তৰ:** c) ভিটামিন D 5. কোনটো ভিটামিন অক্সিজেন বহন কৰা লোহিত ৰক্ত কণিকাৰ উৎপাদনত সহায় ...

NASA NASA The National Aeronautics and Space Administration (NASA) is the US government organization in charge of the country's civilian space program as well as aeronautics and aerospace research. Established on July 29, 1958, by the National Aeronautics and Space Act, NASA aims to pioneer the future in space exploration, scientific discovery, and aeronautics research. Here are some key points about NASA: 1. ** Mission and Objectives* *: NASA's mission includes space exploration, scientific discovery, and aeronautics research. Its objectives are to expand human knowledge of space, improve technology and space applications, foster international cooperation, and contribute to education and inspiration. 2. ** Major Programs and Projects **:    - **Human Spaceflight**: Includes programs like Apollo (moon missions), the Space Shuttle program, and the International Space Station (ISS). The Artemis program aims to return humans to the moon and eventually send astron...

NEUTRON AND PROTON NEUTRON Neutrons are subatomic particles found in the nucleus of an atom, alongside protons. Here are some key points to understand about neutrons: 1. ** Charge **: Neutrons are electrically neutral, meaning they have no charge. This distinguishes them from protons, which are positively charged, and electrons, which are negatively charged. 2. ** Mass **: Neutrons have a mass slightly greater than that of protons. Compared to electrons, protons and neutrons have substantially larger masses. 3. ** Role in the Nucleus **: Neutrons play a crucial role in the stability of the nucleus. They help to offset the electrostatic repulsion between the positively charged protons. The nucleus would become unstable and disintegrate in the absence of neutrons. 4. ** Discovery **: The neutron was discovered in 1932 by the physicist James Chadwick. His discovery helped to further our understanding of atomic structure and led to significant advancements in nuclear physics. 5...