Physics Fluid Mechanics test 1 Welcome to your Physics Fluid Mechanics test 1 Name Email 1 .The buoyant force exerted on an object fully or partially submerged in a fluid medium ( gas or liquid ) is equal to the weight of the fluid that the body displaces.” This principle is : (a) Newton's second law of motion (b) Boyle's principle (c) Archimedes' principle (d) Charles' principle None 2 . What is the relative density of silver ? (a) 9.5 (b) 7.2 (c) 10.4 (d) 10.8 None 3 . Lactometers (used to determine the purity of a sample of milk) and hydrometers (used to determine the density of liquids) are based on the _______ principle. (a) Archimedes (b) special relativity (c) relativity (d) Uncertainty None 4 . What will happen if a glass bottle is completely filled with water, sealed with a lid and put into a freezer ? (a) The glass bottle will be deformed due to atmospheric pressure on the bottle after the water freezes. (b) Eventually, the ice will burst the glass bottle. (c) Nothing will happen. (d) Weight of the glass bottle will increase after water freezes into ice. None 5 . Why do water droplets always take a round shape when dropped onto plane surfaces ? (a) Due to gravity (b) Due to atmospheric pressure (c) Due to presence of Eddy Currents in the air (d) Due to exertion of surface tension by the molecules None 6 . A fuse protects an electric circuit from. (a) inducing current (b) converting one form of energy into other (c) overloading (d) carrying current None 7 . Which force helps swimmers float in water ? (a) Muscular Force (b) Frictional Force (c) Buoyant Force (d) Magnetic Force None 8 . When pressure is applied to a fluid, the pressure change is transmitted to every part of the fluid without any loss. Which of the following laws explains this phenomenon ? (a) Hooke’s Law (b) Bernoulli’s Law (c) Avogadro’s Law (d) Pascal’s Law None Time's up
