science general knowledge ðŸ¤
![Image](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKP4lWV1xfI0BemU2PHwu-xXz40j5nMyxKoPQX7neTdSAJ0hCgheC9wXowElXhdiqlrllFliCdVpGGODREwyQ8F5nRRfncyK_Md0vQQrNw92cVAmyzUetzeb8TRoddnnEon0NtXbegeVvY/s1600/1666251367870978-0.png)
Science General Knowledge 1. Does friction oppose motion? Ans: Friction only opposes relative motion. 2.Does earth move around the sun in circular orbit? Ans: Earth orbits around the sun in an elliptical orbit. 3. What is the most important part of the heart❤️? Ans: Pacemaker. 4. When did Big Bang occur? Ans: About 13.8 billion years ago. 5. What happens in cancer? Ans: Cancer leads to uncontrolled growth of cells. 6. For what discovery was Einstein awarded the Nobel prize? Ans: Photoelectric effect 7. What are four types of waves? Ans: Matter wave, mechanical wave, electromagnetic wave and gravitational wave 8. Write seven em waves in order decreasing wavelengths. Ans: Radio wave, Microwave, infrared wave, visible light, ultraviolet wave, x-ray, gamma ray. 9. On what fact does the electron microscope depend on? Ans: Wave nature of electron. 10. What is the energy of a single photon? Ans: It is given by E=hf where f is the frequency of the photon. 11. How man