What is the difference of developed and developing countries? Developed nations are generally categorized as countries that are more industrialized and have higher per capita income levels. Developing nations are generally categorized as countries that are less industrialized and have lower per capita income levels. How does technology affect development? Increased technology use has the […]
Is the Great Barrier Reef bigger than the Great Wall of China?
Does absorptivity have a unit?
Does absorptivity have a unit? In uv spectroscopy, the concentration of the sample solution is measured in mol L-1 and the length of the light path in cm. Thus, given that absorbance is unitless, the units of molar absorptivity are L mol-1 cm-1. Guanosine has a maximum absorbance of 275 nm. Is molar absorptivity dependent […]
Could an ice age happen again?
Could an ice age happen again? Researchers used data on Earth’s orbit to find the historical warm interglacial period that looks most like the current one and from this have predicted that the next ice age would usually begin within 1,500 years. How long will the current solar minimum last? This period has started in […]
Is screw a simple machine?
Is screw a simple machine? The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw. Six simple machines for transforming energy into work. What tools are needed for a screw? Fill your toolbox with these specific sets of screwdrivers, and you’ll be equipped to tackle whatever screws your household project […]
Why is it harder to do a sit-up with your hands behind your head than with your hands joined over your abdomen?
What are the dangers of infrared light?
What are the dangers of infrared light? IR, particularly IR-A or near IR [700nm-1400nm], raises the internal temperature of the eye, essentially “baking” it. Medical studies indicate that prolonged IR exposure can lead to lens, cornea and retina damage, including cataracts, corneal ulcers and retinal burns, respectively. What’s the difference between red light therapy and […]
What are valid reasons to call CPS?
What are valid reasons to call CPS? When to Call CPS: 5 Specific Reasons Child Protective Services Can be Called. Physical abuse. Does the child have signs of injury or do you believe there’s an imminent threat of violence? Sexual abuse. Have you seen certain behavioral signs, such as flinching or raising of hands in […]
Is Neon better than LED?
Is Neon better than LED? LED neon signs like NeonPlus® are around 80% more energy efficient than traditional neon signs, using far less power and giving off only an inconsequential amount of heat. Are neon signs eco friendly? LED neon signs are environmentally friendly From an environmental perspective, Lead Emitting Diodes (LEDs) are considered green […]
How much does it cost to run a 60 watt bulb?
How much does it cost to run a 60 watt bulb? Appliance Electricity Usage Appliance Typical Consumption Per Hour Cost Per Hour (at 10 cents per kilowatt-hour) Electric range burner 1,000 watts 10 cents Refrigerator 1,000 watts 10 cents Desktop computer and monitor 400 watts 4 cents Incandescent light bulb 60 watts 0.6 cents Is […]