Category: Physics

What is the first law of thermodynamics and why is it important? The first law of thermodynamics has been validated experimentally many times in many places. It is truly a law of physics. It always allows the conversion of energy from one form to another, but never allows energy to be produced or destroyed in […]

What is the formula of i Q t? If a charge Q flows through the cross-section of a conductor in time t, the current I then I=Q/t. The S.I unit of charge is coulomb and measurement of electric current happens in units of coulomb per second which is ‘ampere’. What is Q T? Qt is […]

Which of the following describes the circulatory system? The essential components of the human cardiovascular system are the heart, blood and blood vessels. It includes the pulmonary circulation, a “loop” through the lungs where blood is oxygenated; and the systemic circulation, a “loop” through the rest of the body to provide oxygenated blood. What are […]

What sounds do children acquire first? The sounds most likely to be misarticulated by school-age children are /s/, /r/ and /l/. As new speech sounds are first acquired, their production is inconsistent. For example, some of the first /p/ sounds may be correct and some may be misarticulated. Over time, the way sounds are produced […]

What is the safest medical imaging? Ultrasound. Ultrasound is a typically non-invasive and safe form of medical imaging that has a wide range of applications (NPS MedicineWise 2019). Ultrasound uses sound waves rather than ionising radiation. Is a radiologist a doctor? Radiologists are medical doctors that specialize in diagnosing and treating injuries and diseases using […]

What are the 5 stages of writing? The Writing Process STEP 1: PREWRITING. THINK AND DECIDE. Make sure you understand your assignment. STEP 2: RESEARCH (IF NEEDED) SEARCH. List places where you can find information. STEP 3: DRAFTING. WRITE. Put the information you researched into your own words. STEP 4: REVISING. MAKE IT BETTER. STEP […]

Are we evolving right now? Contrary to popular belief, not only are humans still evolving, their evolution since the dawn of agriculture is faster than ever before. For example, while human DNA is on average 98% identical to chimp DNA, the so-called Human Accelerated Region 1 (HAR1), involved in the development of the brain, is […]

What is the oxidation number of H? +1 What is oxidation number of oxygen in OF2? +2 What is the oxidation number Charge of oxygen *? Oxygen has an oxidation number of −2 in most compounds. The major exception is in peroxides (compounds containing O X 2 X 2 − \ce{O2^2-} OX2X2−), where oxygen has […]

Can I use gel polish without UV light? While you will be able to apply gel nail polish without a UV light, the other “processes” of drying are long and will not give the quality results you expect. A UV light is what dries the gel quickly and without fail. It’s impossible to air it […]

What property of the object has a relationship with the displaced volume? The amount of fluid displaced is directly related (via Archimedes’ principle) to its volume. In the case of an object that sinks (is totally submerged), the volume of the object is displaced. In the case of an object that floats, the amount of […]