5 grade science

Question: In an experiment it was found that litharge, red oxide of lead and lead peroxide contained 92.83%, 90.6% and 86.6% of lead respectively. Show that these figures are in agreement with the Law of Multiple Proportions. Answer: In litharge, the amount of lead = 92.83% The amount o..

Question: How do the prefixes and suffixes for the open chain hydrocarbons indicate their formula? Answer: The prefixes meth-, eth-, prop-, but-, pent-, hex-, hept-, oct-, non- deca- indicate that the number of 'C' atoms in the molecule of hydrocarbons is 1, 2, 3, 4, 5, 6, 7, 8..

Question: Give the equation of motion connecting u, v, a and s where the symbols have their usual meaning 1. v = u + at 2. 3. v 2 - u 2 = 2aS 4. Answer: ..

Question: Identify the micro-organism. What type of micro-organism is it? Name another disease caused by the same type of micro-organism. Answer: It is the bacteria called vibrio cholerae Tuberculosis is the other bacterial disease..

Calculate the number of moles of nitrogen in 7g of nitrog..

Question: Give two common features of plants. Answer: They are stationary They trap the sun's energy to make food...

Question: Define the following types of inertia by giving suitable examples. a) Inertia of rest b) Inertia of motion c) Inertia of direction Answer: Inertia of rest is the property of matter by virtue of which it opposes any change in its state of rest Example: The dust particles on a..

Question: Why are mitochondria also called 'The Power House of cell'? Answer: Energy in the food molecules is converted here (in the mitochondria) into usable energy and stored as ATP molecules. Hence, they are called the power house of the cells..

Question: What do you mean by a freely falling object? Answer: An object which moves towards the earth due to force of gravity is described as a freely falling object..

Question: Chicken A is (all chicken in reference are of same variety egg laying) exposed to very bright sunlight, chicken B is kept inside a dark building whereas chicken C is kept in a well-lit building. Which chicken will have maximum laying output? Answer: Chicken C will have maximum..