What is the most common rock? Sedimentary rocks Is basalt rock hard? Basalt is a hard, black volcanic rock with less than about 52 weight percent silica (SiO2). Because of basalt’s low silica content, it has a low viscosity (resistance to flow). Therefore, basaltic lava can flow quickly and easily move >20 km from a […]
Is oil really fossil fuel?
Is oil really fossil fuel? Fossil fuels include coal, petroleum (oil), natural gas, oil shales, bitumens, and tar sands and heavy oils. For modern life, these energy sources rival food and water in importance. Why can’t we get rid of fossil fuels? We understand today that humanity’s use of fossil fuels is severely damaging our […]
At what temperature does fusion welding takes place?
At what temperature does fusion welding takes place? 900°C Is welding permanent or temporary? Welding is a permanent joint and therefore it is not possible to dismantle the welded parts without partially destroying them. Riveting joint is another permanent joint; while fasteners, cotter joint, knuckle joint, etc. are temporary joints. What are permanent and temporary […]
How is the movement of matter and energy different in an ecosystem?
How is the movement of matter and energy different in an ecosystem? Nutrients can also cycle out of an ecosystem. Energy enters an ecosystem at any level and leaves at any level, while the flow of matter does not. The flow of matter cycles freely between trophic levels and between the ecosystem and the physical […]
What is tolerance in a resistor?
What is tolerance in a resistor? The tolerance of a resistor is the maximum difference between its actual value and the required value and is generally expressed as a plus or minus percentage value. For example, a 1kΩ ±20% tolerance resistor may have a maximum and minimum resistive value of: Maximum Resistance Value. What are […]
Which object is not light source?
Which object is not light source? A few examples of artificial light sources include light bulbs, lamp posts and televisions. Without light sources we could not see the world around us, however, not every object we see is a light source. Many objects simply reflect light from a light source, for example tables, trees and […]
What changes can matter undergo?
What changes can matter undergo? Matter can undergo changes of two basic types: physical changes and chemical changes. Physical changes are processes in which a material changes its physical appearance but not its basic identity. The evaporation of water is a physical change. What are the two kinds of changes that matter may undergo describe […]
What is meant by 1 molar solution?
How do you get rid of x10 on calculator?
How do you get rid of x10 on calculator? Casio models: Press [SHIFT][MODE][6:Fix]. You are then prompted to enter a number between 0 and 9. The number you enter fixes the number of decimal digits your results will have. What does E 4 mean on calculator? The e−4 part means that the decimal point in […]
How many bodies are in the Body Farm?
How many bodies are in the Body Farm? five bodies What are the two primary goals of the Body Farm? Download ppt “THE BODY FARM PRIMARY GOAL: To understand the processes & timetable of postmortem decay, primarily to improve determining the “time since death” in murder.” What are the five stages of decomposition? A corpse […]