What are the similarities and differences between oceanic crust and continental crust? The continental crust is made mostly of rocks with a composition similar to granite (a light-colored rock you would expect to find in the Sierra Nevada), whereas the oceanic crust is made mostly of rocks with a composition of basalt (a dark- colored […]
Why do we see sun before sunrise?
Why do we see sun before sunrise? The rising sun is visible to us before actual sun rise and after actual sunset because of the atmospheric refraction of light. The rays from the sun coming through space enter from rarer to the denser medium and hence bend slightly towards normal at each refraction and become […]
What happens when switch is closed in RC circuit?
What are mixtures that Cannot be separated?
What are mixtures that Cannot be separated? An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements. Which type of matter Cannot be broken down any smaller? a pure or elementary substance cannot be broken down into smaller or simpler constituents without […]
What are the different types of electoral system?
What are the different types of electoral system? The electoral systems currently in use in representative democracies can be divided into two basic kinds: majoritarian systems and proportional representation systems (often referred to as PR). In majoritarian electoral systems, winning candidates are those having attracted the most votes in a given electoral district. What are […]
What primary advantage if any does a ball bearing have over a roller bearing?
What primary advantage if any does a ball bearing have over a roller bearing? As a general rule, ball bearings are used at higher speeds and lighter loads than are roller bearings. Roller bearings perform better under shock and impact loading. What are similarities and differences between a plain bearing and a roller bearing? Rollers […]
What is rate of change in a graph?
Is distance a scalar or vector?
Is distance a scalar or vector? Distance is a scalar quantity that refers to “how much ground an object has covered” during its motion. Displacement is a vector quantity that refers to “how far out of place an object is”; it is the object’s overall change in position. Why distance is called a scalar quantity? […]
What are two most abundant elements in magma?
What are two most abundant elements in magma? Being that oxygen and silicon are the most abundant elements in magma, geologists define magma types in terms of their silica content, expressed as SiO2. These differences in chemical composition are directly related to differences in gas content, temperature, and viscosity. What is magma very short answer? […]
What are the similarities between mitochondria and chloroplast?
What are the similarities between mitochondria and chloroplast? Both the chloroplast and the mitochondrion are organelles found in the cells of plants, but only mitochondria are found in animal cells. The function of chloroplasts and mitochondria is to generate energy for the cells in which they live. The structure of both organelle types includes an […]