Are nucleons equal to mass number? The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. Why mass number is not a whole number? Because most atoms with several […]
What advantage does the van der Waals equation give us over the ideal gas law?
What advantage does the van der Waals equation give us over the ideal gas law? What advantage does the van der Waals equation give us over the ideal gas law? We can account for the behavior of gases under non-ideal conditions. Is ideal gas law or van der Waals more accurate? What pressure does van […]
What does a seed contain Class 6?
What does a seed contain Class 6? A seed has three parts: Seed Coat. Endosperm. Embryo. What is difference between embryo and seed? The embryo, endosperm, and seed coat are the three major parts of a seed….Difference between embryo and seed. Embryo Seed It is formed by the fusion of sperm and nucleus. It is […]
Who predicted properties of undiscovered elements?
Who predicted properties of undiscovered elements? Mendeleev What are elements that have some properties of metals and some properties of nonmetals called? Metalloids may act either like metals or nonmetals in chemical reactions. Most metalloids have some physical properties of metals and some physical properties of nonmetals. They fall between metals and nonmetals in their […]
Where does most of the heat in the atmosphere come from?
Where does most of the heat in the atmosphere come from? the sun What causes the atmosphere to heat up? Due to the chemical composition of the earth’s atmosphere, most of the infrared radiation emitted by the warm surface never reaches space. Instead the radiation is reflected or absorbed by compounds known as greenhouse gasses. […]
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), […]
Does aluminum expand faster than steel when heated?
Does aluminum expand faster than steel when heated? The coefficient for aluminum is 2.4, twice that of iron or steel. This means that an equal temperature change will produce twice as much change in the length of a bar of aluminum as for a bar of iron. Lead is among the most expansive solid materials, […]
Why does my hair stand up when I rub a balloon on it?
Why does my hair stand up when I rub a balloon on it? This is because the rubbing creates a negative charge that is carried by electrons. The electrons can build up to produce static electricity. Consequently, when you pull the balloon slowly away from your head, you can see these two opposite static charges […]
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 […]