How much activity is considered active? Fewer than 1,000 steps a day is sedentary. 1,000 to 10,000 steps or about 4 miles a day is Lightly Active. 10,000 to 23,000 steps or 4 to 10 miles a day is considered Active. More than 23,000 steps or 10 miles a day is Highly active. How many […]
What makes good insulation?
What makes good insulation? Polystyrene and plastic foam are both used as insulators as they have small air bubbles trapped inside them. This makes them very good insulators because heat energy can’t flow through them. This stops the movement of air in the space between the two layers of glass and reduces heat loss from […]
What is an example of experimental control?
What is an example of experimental control? Experimental controls are used in scientific experiments to prevent factors other than those being studied from affecting the outcome. For example, suppose a researcher feeds an experimental artificial sweetener to thirty laboratory rats and observes that eight of them subsequently die of dehydration. How do you show experimental […]
What are the similarities and differences between basic and applied research?
What are the similarities and differences between basic and applied research? Basic research does not have immediate commercial objectives and although it certainly could, it may not necessarily result in an invention or a solution to a practical problem. Applied research is designed to answer specific questions aimed at solving practical problems. Is nursing a […]
Is the moon dying?
Is the moon dying? The moon isn’t “dead” after all. Newly discovered ridges on the moon’s surface are leading scientists to think that the moon might have an active tectonic system. These ridges, speckled with boulders, could be evidence that, not too long ago, tectonic activity broke apart the moon’s surface. Is Moon cracked? In […]
Can a laser Bend?
Can a laser Bend? Five years ago physicists showed that certain kinds of laser beam can follow curved trajectories in free space. The Florida team generated a specially shaped laser beam that could self-accelerate, or bend, sideways. The researchers did not bend the laser beam as a whole but rather the high-intensity regions within it. […]
What are the 4 methods of heat loss?
What are the 4 methods of heat loss? The body loses heat through: Evaporation of water from your skin if it is wet (sweating). Radiation (similar to heat leaving a woodstove). Conduction (such as heat loss from sleeping on the cold ground). Convection (similar to sitting in front of a fan or having the wind […]
How many types of flux does a transformer have?
How many types of flux does a transformer have? There are basically two main types of transformers step-up transformer which converts a low input voltage into high output voltage and step-down transformer which converts high input voltage to low voltage. Transformers are used for regulating AC current, rectification, battery charging, etc. How can flux leakage […]
Is liquid a good conductor of electricity?
Is liquid a good conductor of electricity? Substances which allow easy flow of electric current through them are known as electrical conductors. Metals, graphite and certain liquids are a few examples of good conductors of electricity. What liquids are non conductive? Pretty much any oil or organic liquid is non-conducting. These include: Mineral oil. What […]
What were three practices introduced by the Han dynasty?
What were three practices introduced by the Han dynasty? Significant developments during both major stages included the revival of learning and formulation of Confucian-based educational systems, the expansion of trade and empire to the north, south, and west along the Silk Road, and a general economic expansion domestically, coupled with changes in beliefs and burial […]