Which noble gas is least Polarisable? Helium Why are Group 18 called noble gases? The group 18 elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). These elements are non-reactive and are called noble gases as they have their outermost orbit complete. Due to stable electronic configuration they hardly […]
What problem will create when too much algae?
What problem will create when too much algae? Excessive algae growth will starve or suppress other forms of aquatic plant life, and can block sunlight necessary for their proper growth. Taste and odour problems in drinking water and sometimes even fish kills are associated with excessive blooms of planktonic algae. Is Dissolved oxygen harmful to […]
When a body is placed on a rough plane inclined at an angle?
How do you solve for change in velocity?
How do you solve for change in velocity? Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), […]
How can models help scientists?
How can models help scientists? Models use familiar objects to represent unfamiliar things. Models can help you visualize, or picture in your mind, something that is difficult to see or understand. Models can help scientists communicate their ideas, understand processes, and make predictions. What are some models used in science? Physical models, mathematical models, and […]
What is the chemical that breaks down food in your mouth?
What is the chemical that breaks down food in your mouth? salivary amylase enzyme How is food chemically broken down? Chemical digestion involves the secretions of enzymes throughout your digestive tract. These enzymes break the chemical bonds that hold food particles together. This allows food to be broken down into small, digestible parts. What happens […]
What is the hardest question to ask?
Does sugar dissolve faster in hot or cold water?
Does sugar dissolve faster in hot or cold water? Sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As they move faster, they come into contact with the sugar more often, […]
What is the relation between power and frequency?
What is the relation between power and frequency? The relationship between power and frequency is inversely proportional to each other . The power demand reduces in the load so that the frequency increases in the transient period but at steady state condition. Frequency is number of waves that pass a fixed place in a given […]
What can be used to identify a material?
What can be used to identify a material? To identify a substance, you would compare the density of an unknown substance with the densities of known substances. Examples: The densities of wood, plastic and steel are all different. What are the steps to identify a substance? Four steps to successful substance identification Analyse your substance. […]