Does water absorb sun energy? About 23 percent of incoming solar energy is absorbed in the atmosphere by water vapor, dust, and ozone, and 48 percent passes through the atmosphere and is absorbed by the surface. Thus, about 71 percent of the total incoming solar energy is absorbed by the Earth system. Why is the […]
What is the most common means of transmission of microorganisms in the healthcare environment?
What is the most common means of transmission of microorganisms in the healthcare environment? Among patients and health care personnel, microorganisms are spread to others through four common routes of transmission: contact (direct and indirect), respiratory droplets, airborne spread, and common vehicle. Where do microorganisms live and multiply? Reservoirs are a place within which microorganisms […]
Are blue eyes a mutation?
Are blue eyes a mutation? People with blue eyes have a single, common ancestor, according to new research. A team of scientists has tracked down a genetic mutation that leads to blue eyes. The mutation affected the so-called OCA2 gene, which is involved in the production of melanin, the pigment that gives color to our […]
What are 3 types of observation?
What are 3 types of observation? When it comes to observational research, you have three different types of methodologies: controlled observations, naturalistic observations, and participant observations. Let’s quickly look at what each type of observation includes, how they differ, and the strengths and weaknesses of each type of observation. What are the 2 main types […]
What are examples of developmentally appropriate activities?
What are examples of developmentally appropriate activities? Sharing cardboard books with babies and frequently reading to toddlers on the adult’s lap or together with one or two other children. Providing simple art materials such as crayons, markers, and large paper for toddlers to explore and manipulate. What are the most effective teaching strategies? 7 Effective […]
Why do we need to protect ecosystems?
Why do we need to protect ecosystems? Healthy ecosystems clean our water, purify our air, maintain our soil, regulate the climate, recycle nutrients and provide us with food. They provide raw materials and resources for medicines and other purposes. They are at the foundation of all civilisation and sustain our economies. How can we protect […]
Can you really increase flexibility?
Can you really increase flexibility? However, research has shown that stretching can help improve flexibility, and, consequently, the range of motion of your joints. Better flexibility may: Improve your performance in physical activities. Are splits healthy? Practicing the splits is great for your joint health, flexibility, and balance — qualities that become more and more […]
What is the elastic limit?
What is the elastic limit? Elastic limit, maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation. When stresses up to the elastic limit are removed, the material resumes its original size and shape. Stresses beyond the elastic limit cause a material to yield or […]
What is the difference between natural and forced convection?
What is the difference between natural and forced convection? The key difference between natural and forced convection is that in natural convection, the motion of the fluid is influenced by natural means whereas, in forced convection, the motion of fluids is influenced by external means. What is meant by natural convection? Natural convection is a […]
Which wave is harmful?
Which wave is harmful? The most dangerous frequencies of electromagnetic energy are X-rays, gamma rays, ultraviolet light and microwaves. X-rays, gamma rays and UV light can damage living tissues, and microwaves can cook them. What color can humans not see? Red-green and yellow-blue are the so-called “forbidden colors.” Composed of pairs of hues whose light […]