What is the basic principle of air wedge experiment? The phase difference between the two rays is used to get interference fringes. It’s alternative light and dark fringes. The path difference between the rays has to be equal. What is meant by air wedge? Air Wedge. An air wedge is a simple interferometer used to […]
What electromagnetic waves can be used for communication?
What electromagnetic waves can be used for communication? Radio waves are used for communication such as television and radio. Radio waves are transmitted easily through air. They do not cause damage if absorbed by the human body, and they can be reflected to change their direction. These properties make them ideal for communications. Which wave […]
Can you have a coefficient of restitution greater than 1?
Can you have a coefficient of restitution greater than 1? It normally ranges from 0 to 1 where 1 would be a perfectly elastic collision. It can be more than 1 if there is an energy gain during the collision from a chemical reaction, a reduction in rotational energy, or another internal energy decrease that […]
What are the principles of disaster management?
What are the principles of disaster management? The ethical principles applied during disasters: (i) Humanitarian assistance; (ii) Information and participation during disasters; (iii) Compulsory evacuation of populations; (iv) Respect of dignity; (v) Respect of persons; (vi) Emergency assistance for the most vulnerable persons; (vii) The importance of rescue … What are the importance of disaster […]
Why do I cry when I yawn?
Who invented the lever?
Who invented the lever? Archimedes What is a class 1 lever? In a Class One Lever, the Fulcrum is located between the Load and the Force. The closer the Load is to the Fulcrum, the easier it is to lift (increased mechanical advantage). Examples include see-saws, crow bars, hammer claws, scissors, pliers, and boat oars. […]
Why is look-back time not important for nearby galaxies quizlet?
Why is look-back time not important for nearby galaxies quizlet? Why is look-back time not important for nearby galaxies? Galaxies change very slowly. Which feature of a galaxy seems to be related to the mass of the galaxy’s central supermassive black hole? What is the bravest animal? The Guinness book has declared the honey badger […]
What is a simple food chain?
What is a simple food chain? A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. In a food chain, each organism occupies a different trophic level, defined by how many energy transfers separate it from the basic input of the chain. What is bioaccumulation […]
Why soft iron is used for making the core of an electromagnet?
What are the reasons of non-sampling errors?
What are the reasons of non-sampling errors? Some of the major reasons that lead to the non-sampling errors are: Inadequate data specification or data being inconsistent with the objective of survey or census. Inadequate methods of data collection. Duplication of a subject in the survey. Lack of trained investigators. Lack of supervision of primary staff. […]