Category: Physics

What is the difference between mass and specific weight? The difference between mass and weight is that mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the amount of matter in a body. Weight usually […]

What color does the human eye see best? Green Is green color good for eyes? Dark greens (pine tree green) are one of the most relaxing colours. Green has great healing power. It is the most restful color for the human eye; it can improve vision. Green is very restful to the eye and it’s […]

What does an HR diagram show? The Hertzsprung-Russell Diagram is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage. Stars in the stable phase of hydrogen burning lie along the Main Sequence according to their mass. How was the HR diagram created? It originated […]

Is ADHD a sign of mental retardation? Hyperactivity syndromes and disorders (ADHD and HKD) include the symptoms of overactivity, inattention, and impulsivity, which occur in many other mental disorders as well, including mental retardation (MR). It is not surprising that symptoms of ADHD occur significantly higher in children with learning disabilities. Are people with ADHD […]

Does saddle soreness go away? Schaefer says. When you do get them, however, it’s best to take a break from your bike to give them time to heal. If you catch them early, they typically go away after a few days off the bike, but deeper sores may take few weeks, he says. Will my […]

What if 2 sperm enter an egg? Each sperm cell contains half the father’s DNA. The researchers say it appears that after fertilization, the DNA from the egg and two sperm divided, then got divvied up to create three embryos. Two of the these had enough egg DNA and sperm DNA to make viable embryos. […]

Does a speaker work underwater? Normal speakers don’t fare all that well at the bottom of a swimming pool, so it should come as no surprise to learn that underwater speakers come specially designed to not only deliver quality audio in a submerged environment, but also to avoid shorting out, electrocuting swimmers or turning to […]

Why do we need protected water supply? Source water protection safeguards public health by ensuring the quality and quantity of source water used for drinking-water. Protecting water sources can reduce health risks associated with hazardous agents, particularly for those agents that cannot be effectively removed by conventional water treatment. What are the factors affecting water […]

What is the most important chemical regulator of respiration? CO2 What are the major transport mechanism for carbon dioxide? Carbon dioxide can be transported through the blood via three methods. It is dissolved directly in the blood, bound to plasma proteins or hemoglobin, or converted into bicarbonate. The majority of carbon dioxide is transported as […]

What is the coldest atmosphere? Mesosphere Where does the Earth’s atmosphere end? thermosphere Which gas makes up 78% of Earth’s atmosphere? nitrogen What is the difference between exosphere and atmosphere? The exosphere is the uppermost region of Earth’s atmosphere as it gradually fades into the vacuum of space. The air in the exosphere is extremely […]